< Back Master Gardener Seed Trials – Choose the Best Varieties Julie Harris, Dakota County Master Gardener It’s March and you may be thinking about starting vegetable or flower seeds for your garden this summer. First, you have to decide what to grow - beans, basil, zinnias, tomatoes? But there are several different varieties of each of these plants. So, how do you know what variety to plant? You can look through the seed catalogs or go to the garden store and peruse the many different varieties on the racks. Confused? The University of Minnesota Extension Master Gardeners can help. The UMN Extension sponsors Annual Master Gardener Seed Trials to find the best varieties of various vegetables and flowers. In 2023, 235 Master Gardeners from 51 counties, participated in the Seed Trials. Seed Trial participants test 6 different varieties of 8 different plants against each other (6 vegetables and two flower varieties; including one herb). The collective results of the trials are compiled at the end of each growing season and each plant is ranked. Winners are the top performers in each trial. The rankings are published each year by March – in time to help you, the home gardener, learn about and obtain the most highly ranked plants to grow in your garden – or to purchase when harvested. This will be the 42 nd year of the Seed Trials’ existence, so there is ample data on many varieties to inform the home gardener. In Dakota County, Master Gardeners manage two Seed Trial Gardens; one in the First Presbyterian Church Community Garden, South St. Paul and one at St. Joseph’s Church in Rosemount. Some individual Master Gardeners also participate by testing plants in their own gardens. Two Dakota County Master Gardeners – Marc Battistini and Janice Gestner – are among the group at UMN Extension who select which plants will be part of the trials. Master Gardeners receive the seeds from the UMN Extension and grow the plants from seed. The plants are planted in the ground or transferred to the gardens in the spring according to planting instructions. Teams of Master Gardeners prepare the soil, plant the seeds or seedlings, water, weed, and monitor diseases and insects on the plants over the summer. Taste tests are performed when the plants are ready for harvest. Data is kept throughout the summer on each plant variety regarding: flavor, disease and insect tolerance, productivity and germination rate. At the end of the growing season, the data is given to the UMN Extension, which compiles the statewide data and produces the annual report. Dakota County Master Gardeners who work the gardens also provide horticultural education to community members. Produce is donated to a local food shelf. Complete results of the trials are available here . In 2023, the top ranked plants in each category were: Paste Tomatoes – Cipolla’s Pride; Green Pole Beans – Seychelles; Red Carrots – Malbec; Mustard Greens – Mizuna; Small Watermelon – Mini Love; Purple Basil – Amethyst Improved; Melampodium – Derby; and Pink Cleome – Mauve Queen . You can find a complete list of all of the seed trials since 1982 at the same site. In 2024, Master Gardeners will be testing 6 varieties of Swiss chard, Asian long beans, stem broccoli, cilantro, shallots, snacking peppers, helichrysum (strawflowers) and centaurea (bachelor buttons). Look for the results of those trials in winter 2025. Dakota County Master Gardeners also test plants for the PanAmerican Seed Company. These plants include annual flower varieties and some vegetables. Typically, the seeds grown in these trials are plants that PanAmerican is testing in various test trials around the country to help them decide which plants can be successfully grown and marketed. Data on these plants is compiled periodically over the summer and a report is sent to PanAmerican at the end of the growing season. Currently, the primary trial garden is located in Rosemount. Volunteer Master Gardeners around the state, including Dakota County, participate in various projects which improve horticulture and provide gardening information that will be useful to the home gardener. The vegetable and flower trials are one of these projects. Hopefully, you can use this information to grow happy, healthy vegetables (or flowers) for your enjoyment. Photo Credits: Photo 1 – University of Minnesota Extension; Susan Hickey Photo 2 – Robert Hatlevig Photo 3 – Robert Hatlevig Photo 4 – Robert Hatlevig Photo 5 – Jean Chrysler Photo 6 – Jean Chrysler

< Back Our State Insect: The Monarch Butterfly Lisa Olson, Master Gardener The days are getting shorter, the leaves are changing, some days there is a noticeable chill in the air. Time to head south before the snow flies. I’m not talking about Minnesotans who’ve experienced one too many frigid winters, but rather the Minnesota state butterfly, the monarch. Click here to read fascinating facts about the monarch butterfly, renowned for its extraordinary migration. Since March 31, 2000, the monarch butterfly has represented Minnesota as the state butterfly after being promoted by a fourth-grade class at Anderson Elementary School in Mahtomedi, Minnesota. It was a popular choice. Elementary schools in six other states convinced their state legislatures to adopt the monarch as their state butterfly as well. Though monarch butterflies can be seen all over North America, from Canada to Mexico, the eastern monarch butterfly numbers have dropped drastically over the last few decades. In fact, on July 21, 2022, the International Union for Conservation of Nature declared the monarch as endangered, threatened by habitat destruction and climate change. However, the monarch is not protected by the Endangered Species Act (ESA) because the US Fish and Wildlife Service has not yet determined the monarch belongs on the protected list. Most creatures on the ESA list have very localized habitats, whereas the monarch is widespread, making it difficult to enforce protection of its habitat. To understand the range of the monarch, it is important to look at the life cycle of the insect. The Latin name for the monarch butterfly is Danaus plexippus, which literally means sleepy transformation. The monarch undergoes a complete metamorphosis from egg, to larva (caterpillar), then pupa (chrysalis), and finally the adult stage. The egg and caterpillar stages occur only on species of milkweed (genus Asclepias), whereas adults survive on the nectar from a variety of flowering plants. In a single year, there will be 4 to 5 generations of monarchs. A butterfly lays one egg at a time, roughly the size of a pinhead or pencil tip. But throughout their lifespan a female lays an average of 300-500 eggs specifically on milkweed plants so that the caterpillars will emerge directly on their only source of food. During the caterpillar stage, they simply eat, rest, and grow until they form into a chrysalis from which they finally emerge as a butterfly to begin the cycle all over again. The monarch life cycle The transformation from egg to adult takes about a month, and then they live only two to six weeks as adults, where their main focus is laying eggs to build their population throughout the summer. That is until the last generation of the season. This super generation is the group of butterflies that make the long journey all the way to Mexico along with tens of millions of other monarchs. This generation may live up to eight or nine months! Tags or modern sensors have been placed on monarchs to gather data about the amazing journey that takes them from as far north as Canada thousands of miles to their winter home in Mexico, or in California in the case of the western Monarchs. Upon reaching their destination west of Mexico City, they flutter around in the warmth of the sun by day, and at night they huddle together covering entire trees. In the spring, they make the journey north laying eggs on milkweed plants along the way. To experience for yourself the magical sight of millions of monarchs wintering in Mexico, consider traveling with the Minnesota Landscape Arboretum’s curator of endangered plants on Kingdom of Monarchs | Minnesota Landscape Arboretum trip to Mexico in February 2024. In the days ahead, be on the lookout for the last stragglers beginning their long journey south to Mexico. The easiest way to tell the difference between a male and female monarch, is to note the presence of black dots on each of the male’s wings or the lack of dots on the female. Ponder the long road ahead for these magnificent creatures and perhaps how you can help them thrive in the future. Consider creating or enhancing a pollinator habitat in your yard or community. Identify a sunny location, prepare the site for sowing native seeds or installing native plants, plant, and continue to conduct maintenance to provide a healthy habitat. Check out Minnesota Zoo for a list of Minnesota native pollinator favorites. For additional resources for monarch fans of all ages, visit monarch joint venture . Resources for this article: https://ece.engin.umich.edu/stories/tracking-monarch-butterfly-migration-with-the-worlds-smallest-computer https://www.worldatlas.com/articles/us-state-butterflies-and-insects.html#:~:text=The%20Monarch%20Butterfly%20is%20an,the%20friendliness%20of%20the%20states . https://www.iucn.org/press-release/202207/migratory-monarch-butterfly-now-endangered-iucn-red-list#:~:text=Gland%2C%20Switzerland%2C%2021%20July%202022,habitat%20destruction%20and%20climate%20change . https://www.fws.gov/press-release/2020-12/endangered-species-act-listing-monarch-butterfly-warranted-precluded https://www.worldwildlife.org/species/monarch-butterfly#:~:text=The%20monarch%20butterfly%20is%20known,ability%20to%20hibernate%20and%20metamorphize . https://www.revisor.mn.gov/laws/2000/0/306/ https://www.dnr.state.mn.us/insects/monarchbutterfly.html https://arb.umn.edu/kingdom-monarchs https://mnzoo.org/conservation/act-wildlife/plant-pollinators/ https://www.fs.usda.gov/wildflowers/pollinators/Monarch_Butterfly/migration/index.shtml https://monarchjointventure.org/about-us/partners Photo credits: Lisa Olson, Master Gardener (1), Monarch Joint Venture https://monarchjointventure.org/monarch-biology/life-cycle (2), Monarch Joint Venture https://monarchjointventure.org/monarch-biology/life-cycle (3), https://monarchjointventure.org/monarch-biology/vital-statistics-and-measuring (4)

< Back Sustainable Foraging for Wild Foods: Lessons from Indigenous Gardening Practices Foraging for wild foods is an increasingly popular activity, and it’s not hard to see why: it’s fun, educational, and delicious! It’s also not surprising that there is considerable overlap among people who enjoy gardening at home and searching for edible plants in the woods and prairies. As more people seek out and harvest wild foods, however, it is critical to do so responsibly and sustainably for the protection of biodiversity and the wellbeing of future generations. This article discusses how we can look for inspiration and guidance from our region’s Indigenous peoples and provides resources to forage safely and responsibly. Greg Siems, Dakota County Master Gardener For those of us who descended from European settlers, it is common to view gardening and foraging as distinct (albeit food-related) activities - one involves direct cultivation, and the other involves harvesting what mother nature has produced herself. If we consider Indigenous history and experience, however, we see how many “wild” foods have been carefully managed in ways that could and should be considered as “gardening” in the Western sense. 1 Through careful observation and strong norms of stewardship and reciprocity, Indigenous practices such as controlled burns, selective harvesting, and the intentional sowing of seeds in opportune places, led to the development of dynamic ecosystems that supported both human and non-human needs for centuries. 2 In Minnesota, the Dakota and Ojibwe peoples have maintained their own deep and complex relationships with the land and its inhabitants. Both tribes view the land as a living entity, deserving of mutual respect. Ceremonies are often conducted in the harvesting of wild rice and other foods, giving thanks to the earth for its resources and establishing an ethic of responsibility for the ongoing health of individual species and full ecosystems. Modern foragers should adopt this same mindset by approaching the land with humility and gratitude. Wild rice harvesting Selective harvesting is perhaps the most critical practice that aligns with these principles. Indigenous peoples sought to harvest only as much as plant populations would allow, ensuring that enough fruits, seeds, nuts, and fungi persisted as future food sources for humans and nonhumans alike. Careful foraging is not just good manners; it is fully in our own self-interest! Similarly, using all parts of the plant reduces waste and is a demonstration of respect for the lives of all kinds that support our wellbeing. Beyond the moral imperative to forage responsibly, you must be mindful of current rules and regulations that can vary by location and jurisdiction. And, if you are hoping to forage on private property, always secure permission first. In all cases, foraging responsibly requires a certain amount of knowledge of the particular food and an awareness of its surroundings for potential growth or threats. There are a number of great resources available for anyone interested in learning more about specific plants, mushrooms, and other wild foods. Sam Thayer’s Field Guide to Edible Wild Plants is widely considered authoritative and provides a comprehensive introduction to hundreds of species. Kelly Kindscher’s Edible Wild Plants of the Prairie: An Ethnobotanical Guide also includes a great deal of Indigenous history and culture surrounding the use of many familiar (and unfamiliar) plants. As common sense would dictate, unless you are already familiar with a particular species it is absolutely necessary to positively identify what is in front of you and learn how to safely consume it. Ramps - wild onions or leeks Foraging sustainably is more important than ever as our natural resources face the additional increasing pressures of climate change, invasive species, and urban development. In order to promote the health and wellbeing of human and nonhuman worlds, we must honor the enduring wisdom and teachings of the Dakota and Ojibwe peoples. Ethical foraging is more than just a list of rules or practices—it is an ongoing relationship between people and the land that nurtures us. Next time you find yourself moseying for morels or rooting for ramps, I hope you will think of yourself not as someone who has come simply to take and consume, but to garden and grow. 1 An excellent resource to begin learning about these practices is M. Kat Anderson’s Tending the Wild Native American Knowledge and the Management of California's Natural Resources . 2 There has been a great deal of modern research on how, for example, Indigenous peoples intentionally supported the biodiversity and soil quality of the Amazon rainforest, once thought by European colonizers (and perhaps still by some today) to be an untamed wilderness. Photo Credits: public domain (1-3)

< Back Don’t Let Powdery Mildew Haunt You! Cherise Skeba, Dakota County Master Gardener Powdery mildew is a very common garden fungus. This fungus was even more prevalent last year when our abundant rainfall increased our summer humidity. If you experienced powdery mildew in your garden during 2024, what can you do, if anything, to ensure the fungus does not continue to haunt your garden this year? Read this very informative article to understand what powdery mildew is, how it affects plants, what you can do to prevent it and how to control it when it happens. If you experienced powdery mildew in your garden during 2024, what can you do, if anything, to ensure the fungus does not continue to haunt your garden this year? Remember how the weather affected your garden last year? Dakota County received an extra 4” to 5” of rain and the average temperature during the 2024 gardening season compared with the average for the previous 25 years. The extra rainfall increased humidity and helped produce an abundance of powdery mildew in many Minnesota gardens. If your garden plants suffered from powdery mildew, you are not alone. Powdery mildew is one of the most prevalent crop diseases in the world,,3 affecting hundreds of types of plants including many common garden vegetables and flowers. This article explores what you can do to reduce the chances of last year’s powdery mildew returning to haunt your garden this year. What is powdery mildew? Powdery mildew is a fungal disease stemming from several different pathogens that vary by host plant. Plants with early infections of powdery mildew may have yellow spots, dark blotches, discoloring and lesions on leaves, usually on the upper surface of newer leaves and lower leaves. The disease then progresses to include a ghostly-white, powder-like substance (image 1) on leaves and stems. If left unchecked, powdery mildew will quickly spread to cover the plant and wither the leaves and stems. The pathogen can spread from 10% of the leaves to 70% of the leaves in a week2. A severe infection will cause leaves to drop off and can significantly reduce fruit and flower production. The white spores of powdery mildew eventually mature into brown and black pinhead-sized spheres caed cleistothecia or chasmothecia (image 2). Cleistothecia will survive the winter and release new powdery mildew spores in the spring. ,,10 Powdery mildew fungal spores infect only plants’ surface structures to take up nutrients and do not invade interior plant tissues. Therefore, it is rare that powdery mildew kills a plant but the plant may appear to be decimated. 2,10 Minnesota weather and powdery mildew. Powdery mildew requires humidity (but not necessarily the presence of water on the leaves) for spore germination. Humidity refers to the amount of water vapor in the air. Humidity will increase around plants when the ground around the plants is wet and ground moisture steams into the air. Variable relative humidity during the garden season will help promote powdery mildew. Relative humidity refers to the ratio of water vapor in the air versus the maximum water vapor possible in the air at a specific temperature. The maximum water vapor level is lower at lower temperatures. Therefore, for a fixed humidity level, relative humidity rises as the temperature falls. High relative humidity stimulates powdery mildew fungal reproduction while low relative humidity helps disperse fungal spores. Although powdery mildew requires humidity, the disease does not flourish in cool, rainy conditions.5 In fact, extended rainfall can help wash powdery mildew spores off leaves, inhibit germination and potentially kill powdery mildew spores. Powdery mildew spreads most rapidly in warm, cloudy12 weather (60o-80o F) and the spread decelerates in cool and hot weather.5 Note that leaf temperatures on sunny days are warmer than the surrounding air temperatures and leaf temperatures above 95o F are fatal to some (if not all) powdery mildews.2,4 All of the weather preferences mentioned above mean that powdery mildew thrives when days are warm and relatively dry (spreads spores) while nights are warm and humid (germinates spores).5 Unfortunately, this recipe aligns with Minnesota summer conditions making powdery mildew a frequent pathogen in our gardens. Prevent: what to do before a powdery mildew outbreak. While you cannot control the weather, you can minimize garden conditions that encourage powdery mildew. Prevention of powdery mildew should be the primary focus of gardeners because the disease is very difficult to eradicate once the disease is established in a garden.5 Frequently examine leaves and stems for a potential powdery mildew outbreak since early detection and action are critical to reducing the spread of the disease.5,12 Choose sunnier garden spots , when possible, for plant types that are more susceptible to powdery mildew since powdery mildew will grow more in shaded areas. Highly susceptible garden plants include apples, bee balm, begonias, columbine, cucumbers, grapes, lilacs, peas, peonies, phlox, potatoes, rhododendron, roses, rudbeckia, squash and zinnias.6,,,10,12 Increase airflow around plants to help reduce humidity and reduce moisture on plant leaves. Air flow will improve when you thin out plants, pull weeds, prune perennials, stake or trellis plants, and keep a space between plants and solid structures (e.g. keep plants 8”-12” from buildings).3,5,10,11 Avoid over-watering of plants , especially in areas with slow draining soil. Water at the base of the plants, not on the leaves, and water early in the morning to give the plants time to dry out before night fall.3 Plant garden varietals resistant to powdery mildew .5,12 Garden catalogs, seed packets and garden stores should provide information on the disease-resistant characteristics of plants.10,11 In addition, Cornell University provides a database of disease-resistant vegetable varietals. For example, Cornell reports that Avalanche snow peas and Cascadia snap peas are resistant to powdery mildew. Cornell’s 2025 information is based on 2018-22 data and should be confirmed, if possible, with plant-specific information for the current growing season. powdery mildew on Ninebark Control: what to do during a powdery mildew outbreak. If you identify powdery mildew in your garden, you should follow all the powdery mildew prevention recommendations and also take the following actions to help control the outbreak. It is important to act quickly when you diagnose powdery mildew in the garden since the pathogen spreads so rapidly. Trim off infected plant leaves and stems and remove the debris from the garden. Consider removing the entire plant if the infection has progressed significantly or if nearby plants are at risk of becoming infected.5,11 Trim off leaves near the ground and newer leaves and stems of the infected plants. Newer leaves are more susceptible to powdery mildew. Avoid fertilizing late in the season which encourages new plant growth.3,10 Sterilize tools that were used to trim plants infected with powdery mildew before using the tools on healthy plants. Tolerate small outbreaks of powdery mildew. The best management course may be tolerance of powdery mildew when the plant is beyond peak production and surrounding plants are not at risk. You may want to harvest full-grown pumpkins or squash in this situation to avoid powdery mildew attacking the fruit. Pumpkins and squash should last a couple of months if stored in a cool, dark spot after harvesting.11 Fungicides should only be used as a last resort since fungicides can harm both plants and insects.5 There are many fungicides that people have applied in attempts to control powdery mildew including milk, garlic, baking soda, neem oil, horticultural oils, potassium bicarbonate, sulfur and copper. Before choosing a fungicide, be sure to understand if the fungicide is a protectant (e.g. sulfur) or eradicant (e.g. oils) fungicide. Protectant fungicides only work if applied prior to a powdery mildew outbreak and usually require repeat applications. Eradicant fungicides work best if applied after a powdery mildew outbreak but before the outbreak becomes severe. Fungicides will not eliminate powdery mildew after the majority of leaves are infected.10 Be sure to follow any instructions provided on the fungicide packaging.3,6 There are a few specific situations where fungicides should be avoided even though powdery mildew is present in the garden. Fungicides should not be applied to late-season powdery mildew outbreaks when the autumnal leaves are close to dropping since the infection is not as harmful to the plant at that point.8 Fungicides should also not be applied to infected annual flowers or low-value perennial flowers since the fungicides can kill pollinators.10 Note that supporting research is very limited with regards to the efficacy of home remedies (e.g. milk, garlic, baking soda) for powdery mildew prevention or eradication. In addition, preventive and control activities should always be completed regardless of whether or not fungicides are applied. Fungicides are rarely necessary., Minimize: what to do after a powdery mildew outbreak. powdery mildew on peony Powdery mildew can survive winter on both live plants and plant debris. Therefore, powdery mildew is likely to recur once it is in your garden unless you take precautions to control the disease. Autumn and spring clean-ups are critical to breaking the cycle of last year’s powdery mildew outbreak. All annuals that were infected should be pulled and removed from the garden, preferably in autumn but spring cleaning is acceptable. Perennials should be pruned to remove infected plant material and to increase air flow. In addition, any plant debris in and around infected plants should be collected and removed from the garden. Do not till infected plant material into the ground as powdery mildew will continue to live in the plant material. Infected refuse should be burned or composted by a commercial composter. Home composting does not get hot enough for long enough to kill powdery mildew.3,5 Powdery mildew requires plant material to thrive. Therefore, you should not need to treat or remove wood chips or soil from powdery mildew areas. However, if the wood chips appear moldy after a powdery mildew outbreak, you may want to remove the wood chips as a precautionary measure. Because powdery mildew pathogens vary by host plant type, rotating plants (i.e. do not put the same plant type in the same space as last year) is key to minimizing the recurrence of powdery mildew. The following table provides groupings of common garden plants that are affected by the same specific powdery mildew pathogen2. If you had one of the plants shown in a group in your garden last year and those plants were infected by powdery mildew, you should avoid planting any of the plants in the same group in the same spot in your garden this year. Note that some plants are included in multiple groups indicating that those plants may be impacted by more than one powdery mildew pathogen. Powdery Mildew Pathogen Plants Impacted by Specific Pathogen2 Erysiphe cichoracearum Cucumbers, endive, lettuce, melons, potato, pumpkin, squash Erysiphe cruciferarum Cole crops (e.g. broccoli, brussels sprouts, cauliflower), radicchio, radishes, turnips Erysiphe lycopersici Tomatoes Erysiphe pisi Peas Erysiphe heraclei Carrots, parsley, parsnips Erysiphe polygoni Beets Leveillula taurica Artichoke, eggplant, peppers, tomatillos, tomatoes Sphaerotheca fuliginea Beans, black-eyed peas, cucurbits (pumpkins, gourds, squash), okra Photo Credits: Cherise Skeba (1), Michigan State University, http://www.canr.msu.edu/news/late- (2), University of Minnesota (3), University of Minnesota, M. Grabowski (4) 1 National Centers for Environmental Information, May-September 2024 compared with May-September 1999-2023, http://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/time-series/MN-037/tavg/5/9/1999-2024?base_prd=true&begbaseyear=1999&endbaseyear=2023 2 EOS (Earth Observing System) Data Analytics, “Powdery Mildew: Effective Prevention And Treatment”, http://eos.com/blog/powdery-mildew/#:~:text=Powdery%20mildew%20is%20among%20the,would%20kill%20most%20other%20fungi . 3 Colorado State University, “Powdery Mildews”, http://extension.colostate.edu/topic-areas/yard-garden/powdery-mildews-2-902/ 4 Michigan State University, “Late-season control of powdery mildew in grapes”, Image 2 and content from http://www.canr.msu.edu/news/late-season_control_of_powdery_mildew_in_grapes_focus_on_inoculum_managemen 5 Penn State, “Addressing Downy Mildew and Powdery Mildew in the Home Garden”, http://extension.psu.edu/addressing-downy-mildew-and-powdery-mildew-in-the-home-garden#:~:text=In%20some%20plants%2C%20such%20as,oily%20spot%20on%20the%20leaves.&text=Powdery%20mildew%20looks%20like%20flour,across%20the%20top%20of%20leaves . 6 University of California, Davis, “Powdery Mildew on Ornamentals”, http://ipm.ucanr.edu/home-and-landscape/powdery-mildew-on-ornamentals/pest-notes/#gsc.tab=0 7 Western Massachusetts Master Gardener Assocication, “Powdery Mildew”, http://www.wmmga.org/content.aspx?page_id=22&club_id=101643&module_id=2289318 Western Massachusetts Master Gardener Assocication, “Powdery Mildew”, http://www.wmmga.org/content.aspx?page_id=22&club_id=101643&module_id=228931 8 Iowa State University, “Powdery Mildew- Ornamental plants”, http://yardandgarden.extension.iastate.edu/encyclopedia/powdery-mildew-ornamental-plants 9 Cornell University, “Disease Resistant Vegetable Varieties”, http://www.vegetables.cornell.edu/pest-management/disease-factsheets/disease-resistant-vegetable-varieties 10 University of Minnesota, “Powdery mildew in the flower garden”, http://extension.umn.edu/plant-diseases/powdery-mildew-flower-garden#:~:text=How%20to%20identify%20powdery%20mildew,to%20red%20around%20the%20infection . 11 University of Minnesota, “Powdery mildew in flowers and vining vegetables”, http://extension.umn.edu/yard-and-garden-news/powdery-mildew-flowers-and-vining-vegetables 12 Oklahoma State University, “Pumpkin and Squash Diseases”, http://extension.okstate.edu/fact-sheets/pumpkin-and-squash-diseases.html

< Back Minnesota’s State Muffin and Its Star Ingredient: The Blueberry Blueberry season may be over this year, but as you reflect on this past year and contemplate what to plant next year, a beverage with a nice, big, blueberry muffin may inspire your garden plans. Is your mouth watering yet? Read about the blueberry muffin, some interesting information about growing and picking blueberries in Minnesota, and you’ll also find a couple of bonus recipes to try this winter! Lisa Olson, Master Gardener All 50 states have state symbols - some more than others. (Looking at you, Texas, with at least 70 state symbols!) Only three states, however, have a muffin symbol. New York chose the apple muffin, Massachusetts has the corn muffin, and in 1987 a group of elementary students from Carlton, Minnesota, near Duluth, began their quest to secure the blueberry muffin as the Minnesota state muffin. It was really an exercise in learning about the legislative process. And educational it was. Their first assignment was to choose the muffin flavor that best represented Minnesota. Blueberry was the students’ muffin of choice - fitting, since blueberries are grown across the state. After multiple trips to the capitol during the next session to watch the process of passing bills, the blueberry muffin eventually made its way through in 1988. Perhaps it helped that the “Blueberry Muffin Gang” from Carlton brought muffins for all the legislators on one of their trips in order to help their cause. Minnesota is home to two native blueberry plants: lowbush ( Vaccinium angustifolium ) and velvetleaf ( V. myrtilloides ). They are mostly found in the northeast part of the state, but they can be found across the state from the northwest to the far southeast corner as well. Wild blueberries are generally much smaller than cultivated blueberries so growing blueberries commercially in Minnesota was a challenge because of the cold climate. That changed when the University of Minnesota began researching and breeding cold-hardy, large-fruited cultivars in the 1960’s. Larger berries, taller plants making picking the fruit easier, and breeding for harvesting over a longer season have all greatly improved the commercial production and also provided home growers with more varieties to choose from. The University of Minnesota even cultivated a pink variety. Yes, a pink blueberry! If you are interested in growing blueberries at your home, the University of Minnesota is a great resource to help you select the right plant for your conditions, and for planting and maintaining tips. Here are some quick facts to get you started: Not interested in growing your own? You can still pick your own. There are numerous pick-your-own farms in Minnesota. If you are feeling a little more adventurous, you can pick wild blueberries. Minnesota state parks, Superior National Forest lands, state forest lands, and the Boundary Waters Canoe Area all actually allow berry picking for personal consumption. If you pick an abundance, they freeze well so you can enjoy them all year. Here are a couple of recipes to enjoy. Even though blueberry picking season in Minnesota ends in July or August, blueberry muffins are always in season. The muffin recipe is the official state muffin recipe from the Minnesota Secretary of State website. The pie recipe is especially good for fall and winter occasions with cinnamon, nutmeg, and allspice. You will need some fresh blueberries, so thankfully it is always blueberry season somewhere in the world! The combination of fresh and cooked berries make this pie unique and especially delicious. Enjoy! Blueberry Muffin Recipe By Shari Baker, Gunflint Pines Resort 2 c. Flour ½ c. Sugar 1 T. Baking powder ½ t. Salt 1 T. Orange zest (grated peel) 1 c. Blueberries (fresh, dried, or frozen—Do not thaw or rehydrate) 1 c. White Chocolate Chips (*optional, but great!) 1-¼ c. Buttermilk 1 Egg ½ t. Vanilla Sugar in the Raw (large-grain brown sugar) Preheat oven to 425F. Mix buttermilk, egg, and vanilla; set aside. Mix dry ingredients, orange zest, blueberries, and white chocolate chips. Make well in center, pour in liquid mixture, and stir lightly just until mixed. Spoon into lined or greased muffin tins. Top with sugar in the raw, and bake for 20 to 22 minutes. Makes a “baker’s dozen”. New England Blueberry Pie 4 c. fresh blueberries ½ c. sugar ½ c. brown sugar, packed 1 Tbsp. lemon juice ¼ tsp. allspice ¼ tsp. cinnamon ⅛ tsp. nutmeg ¼ tsp. salt 1 8-9” baked pie shell In a saucepan, combine 2 c. berries with sugar, flour, butter, lemon juice, and all the spices and salt. Cook over low heat to a boil. Cook for 5 minutes or until thick. Cool. When cool, add the remaining 2 c. of blueberries. Transfer all of the blueberry mixture into the cooled pie shell. Chill pie. Serve with whipped cream. Resources: https://www.startribune.com/minnesota-symbols-blueberry-muffin-carlton-south-terrace/600172953/ https://www.dnr.state.mn.us/mcvmagazine/issues/2023/jul-aug/bucket.html https://mnhardy.umn.edu/blueberries https://extension.umn.edu/fruit/growing-blueberries-home-garden#staking-and-support-19061 https://www.sos.state.mn.us/about-minnesota/state-symbols/state-muffin-blueberry/ https://extension.umn.edu/fruit/commercial-blueberry-production-minnesota-and-wisconsin Photo credits: Minnesota Secretary of State (1), Courtesy of University of Minnesota (2), University of Minnesota Extension (3)

< Back Our State Flower: The Showy Lady’s Slipper Lisa Olson, Master Gardener Have you ever wondered about how state symbols came to be? Though united as one great nation, each of our 50 states is proud to highlight its unique representations, as varied as the individuals who inhabit their lands. Over the next several months, in this section you can learn more about some of our own Minnesota state symbols. The state flower is a fitting place to launch our exploration of our state symbols as it paved the way for the rest of the symbols chosen to proudly represent each state. And so we begin with our Minnesota state flower, the showy lady’s slipper. The showy lady’s slipper is also known by its Latin name, Cypripedium reginae, and more common name, pink and white lady’s slipper or simply moccasin flower. To the Ojibwe, it is known as Agobizowin . Its designation as Minnesota’s state flower was passed into law in 1967, but the journey began long ago in 1893, inspired by the World’s Fair in Chicago. The 1893 World’s Fair brought people from each state and at least 40 countries to Chicago to celebrate ideas, inventions, and achievements. The Congress of Representative Women was a weeklong convention at the fair that brought hundreds of women together from across the United States and the world to voice concerns of the day in front of crowds numbering in the thousands. To prepare for the event, one idea proposed was the “National Garland of Flowers,” whereby each U.S. state and territory would choose a flower that represented the state’s history, culture, and environment at the fair. The plants chosen for the fair were not yet considered official state flowers, but the event did inspire states to consider the idea of an official state flower. After consulting with a state botanist, women from across the state inclusive of every congressional district voted for a state flower from the following list: Lady’s Slipper Silky Aster Indian Pink Coneflower Wild Rose The lady’s slipper won by a huge margin and a petition was written to the state legislature to make it the state flower. While the picture of the correct plant made its way onto the Minnesota state flag in 1893, the incorrect Latin name was used in the official petition to the legislature, and the Senate designated Cypripedium calceolous, a flower that doesn’t exist in Minnesota, as our state symbol. Thankfully, the women of the St. Anthony Study Circle caught the error, and in 1902 a new resolution was written. The error didn’t go unnoticed, however. Newspapers of the day were quick to run headlines proclaiming our state flower a fake. But all’s well that ends well. The corrected resolution was passed by the Senate and House naming Cypripedium reginae , or showy lady’s slipper, as our state flower. Finally, in 1967 an actual law was passed that sealed the correct plant its place in our state’s history as our official state flower. The showy lady’s slipper is the tallest of over 40 orchid species native to Minnesota. The Latin species name reginae means “queen” and spotting this magnificent plant in the wild makes it clear how this moccasin flower got its name. It grows one to two feet tall and produces usually one or two flowers on its tall, sturdy stem. Out of a single rhizome, up to 20 stems may emerge. The flower consists of white petals and sepals and a magenta streaked inflated pouch, or slipper. Blooms last up to two weeks and typically occur in June to early July. Four to twelve large elliptical leaves that are five to ten inches long with parallel veins wrap around the stem. The leaves and stem are covered in bristle-like hair that may cause a rash if touched. This showy plant commonly lives 50 years, though some plants have been known to survive 100 years! It is a good thing it is so long-lived as it may take up to 16 years for its first flower to bloom. Each year a plant may produce as many as 500,000 seeds that are as fine as flour dust. They do not transplant well. It is better to just enjoy them by taking a photo if you find one. In fact, since 1925, the showy lady’s slipper has been protected by law making it illegal to pick or dig up the plants. For specific rules regarding written permission and permits from the Minnesota Department of Natural Resources and the Minnesota Department of Transportation, you can read Information on transplanting Lady's-slipper Orchids . Here are a few ways to enjoy the showy lady’s slipper in person: Go to the Minnesota Landscape Arboretum . Call the Bloom Line ( 612-625-9791) in advance to hear if they are in bloom along the Arb’s Bog Walk. Walk along Lady’s Slipper Lane at the Eloise Butler Wildflower Garden and Bird Sanctuary in Minneapolis. Take a drive along Lady Slipper Scenic Byway in northern Minnesota through the Chippewa National Forest to see them blooming along the roadside. To learn more about our beautiful state flower, see the following links for additional information: https://www.leg.mn.gov/leg/symbols https://www.leg.mn.gov/webcontent/leg/symbols/flower2.pdf https://statesymbolsusa.org/ https://learninglab.si.edu/collections/a-national-garland-how-women-led-the-movement-to-declare-state-flowers/mAFroO4vbPlJakiE https://arbconservation.umn.edu/minnesotas-native-orchids#:~:text=There%20are%20roughly%20200%20species,one%20quarter%20of%20all%20species . https://www.fs.usda.gov/wildflowers/plant-of-the-week/cypripedium_reginae.shtml https://arb.umn.edu/about/contact-us https://www.minneapolisparks.org/parks-destinations/parks-lakes/gardens__bird_sanctuaries/eloise_butler_wildflower_garden_and_bird_sanctuary/ https://www.dnr.state.mn.us/snapshots/plants/showyladysslipper.html https://www.minnesotawildflowers.info/flower/showy-ladys-slipper https://seasonwatch.umn.edu/showy-ladys-slipper Photo Credit: Office of the Minnesota Secretary of State (1), Minnesota Department of Natural Resources and US Forest Service (2,3), Minnesota Landscape Arboretum (5)

< Back Beware Garlic Mustard in Early Spring Garlic Mustard may be edible and tasty but unless you are planning to cook with it, you will not want it growing in your yard. One of the first weeds to appear in the spring, Garlic Mustard is a noxious weed that is difficult to get rid of. Read this article to learn how to identify Garlic Mustard and how to control it. Mickey Scullard, Dakota County Master Gardener While working in my rain garden one Fall, planting tulips and other spring bulbs, I discovered a new patch of unknown plants growing that I knew I had not planted. And it smelled like garlic when I pulled it out – but it sure didn’t look like the garlic I grow. I recalled someone talking about Garlic Mustard and based on the pictures and description I found on the University of Minnesota Extension garden website ( UMN Extension - Garlic Mustard ), determined that was my newest garden challenge. Despite sounding like something delicious (and it can be used to cook), Garlic Mustard is on the MN Department of Agriculture’s Noxious Weed list . Garlic Mustard is allelopathic, sending out chemicals that cause the reduced growth of nearby plants. It is challenging to eradicate. However, knowing its lifecycle can help you manage it ( Garlic Mustard Lifecycle graphic ). It is a biennial, which means during the first year, green vegetation growth occurs, with heart-shaped leaves that grow in a rosette format. In the second year, Garlic Mustard shoots up a stalk, 1 to 4 feet with serrated leaves and produces flowers and then seeds. The flowers are small, white, and have four petals. Seeds are produced in black oblong capsules with a single row of seeds. There can be over 100 seeds released by one plant and they can survive in the soil for five years. Controlling Garlic Mustard takes perseverance. It is one of the first plants to emerge in the spring and the green leaves make it easy to find. Handpulling the plants is an option however, it is important to pull out the entire root. The Garlic Mustard root is a long, slender tap with an S-shaped end that makes it difficult to pull out fully. Disposing of the plants must be done correctly to avoid spreading it further. If you pull out plants that are flowering, you need to make sure to bag the plants as they can still produce seeds for several days. The pulled plants should remain on site to decay naturally, according to the Noxious Weed List information. And it is illegal to put them in garbage bins (Minnesota Statute 115A.931). Some chemicals, such as those that have triclopyr (Garlon) or glyphosate, have been effective especially when carefully applied in early spring or late fall before Garlic Mustard flowers. Despite being a noxious weed, Garlic Mustard is actually edible and tasty. You can make pesto, soups, quiches, salads, cakes, and more ( Garlic Mustard Recipes ). Make sure you are harvesting it safely and legally, for example, avoid roadside ditches that may have been treated with pesticides. Photo Credit: University of Minnesota Extension https://extension.umn.edu/identify-invasive-species/garlic-mustard#disposal-2997812 (1,2,3)

< Back Autumn Leaves Brynne Eisele, Master Gardener This page introduces books and fun activities that will help your child to understand why leaves change color and learn that leaves have some things in common with humans. https://www.youtube.com/watch?v=kiQrG88OcmY Summer Green to Autumn Gold: Uncovering Leaves’ Hidden Colors , by Mia Posada, answers readers’ (ages 5-10) questions about why leaves change colors. It gives the science behind the many different colors of leaves and includes beautiful watercolor and collage art on every page. The author and illustrator reside in Golden Valley, MN! Fletcher and the Falling Leaves , by Julia Rawlinson, lets young readers (ages 1-5) follow Fletcher the fox cub as he discovers his favorite tree seems to be sick. Each day more leaves turn brown and fall to the ground. Fletcher is very worried for the tree until he finds a wonderful surprise on the first day of winter. Do For elementary aged children try these two very simple experiments that demonstrate the importance of trees and their leaves to our daily lives. It will also help them visualize the concept that plants and trees are alive just like us! 1. Do Leaves Breathe? Materials: Freshly picked leaf that is still green Bowl of water large enough to fit the leaf Rock or something to weigh down the leaf Instructions: Ask the child to observe the leaf. What do they see? Do they hear the leaf breathing? Fill the bowl with water and submerge the leaf in water using the rock to make sure the leaf is fully submerged. Place the bowl in a sunny location. Wait for a few hours then check on the leaf. You should see small bubbles forming on the leaf and edges of the bowl Explanation: Your child is observing part of the process of photosynthesis where oxygen is being expelled from the leaf. While the leaf doesn’t use lungs to breath as we do, it does similarly take in and release air. As humans we breathe in the oxygen expelled in our daily lives. Adapted from science-u.org 2. Do Leaves Sweat? Materials: Clear zip lock bag String or twist tie to secure the bag tightly Branch of leaves in the sun Instructions: Ask the child to observe the leaf. How does the leaf feel? Can they see the leaf sweating? Fit the plastic bag on the end of a branch which has several green leaves on it. Make sure your branch is in the sunlight for a few hours. Secure the bag tightly with the string or twist tie. One corner of the bag should be pointing down toward the ground so that the water can collect into one location. After a few hours, check the bag. You should see water pooled in the corner of the bag. Explanation: Your child is observing plant transpiration. This process can be explained to a child by comparing it to a human sweating and expelling water to cool down. Plant transpiration is crucial to our daily lives as it releases water into our atmosphere to be evaporated. Adapted from Kids Fun Science, Youtube channel Fall Leaf Scavenger Hunt For younger children around ages 2-5 set up a fall leaf scavenger hunt. Depending on the age, the child may need greater parental assistance. See below for some suggestions but feel free to add your own categories! Find a yellow leaf (or one with yellow on it) Find a green leaf (or one with green on it) Find a red leaf (or one with red on it) Find a brown leaf (or one with brown on it) Find a leaf with a whole in it Find a leaf with three points Find a leaf that has an oval shape Find a small leaf Find a big leaf

< Back Beware the Majestic Black Walnut Tree Gail Maifeld, Dakota County Master Gardener The black walnut tree is beautiful in the landscape and provides food for wildlife and humans. But the chemical juglone, that is present in all parts of the black walnut tree, provides a cautionary tale for the suburban gardener. Read this article to understand the pros and significant cons of growing a black walnut tree near a garden where you plan to grow flowers or vegetables. On the positive side, black walnut trees have been prized by furniture makers, carpenters, and wood carvers for their beautiful dark grained wood. Their tree nuts make it an excellent variety to plant for wildlife. Squirrels like to bury the tree nuts for later eating. Humans also like to pick the nutmeat out of the green covering and walnuts are a popular not for use in baking muffins, cookies, and bars. The tree is found across the northern United States among other forest trees. Single stands of black walnut trees are usually not found, instead a single tree will tower above other deciduous trees in the forest. The black walnut can grow to 100 feet tall with deep furrowed dark bark and thick branches, which makes it a great shade tree. Leaves have 11-13 leaflets along a toothed spear. The tree likes moist well drained soils along creeks and rivers. But black walnut trees carry a major negative characteristic. The entire tree is toxic. Roots, buds, leaves and nut hulls contain a chemical called juglone toxin . The soil under the tree will have the highest level of juglone due to the accumulation of roots, fallen leaves, hulls and nuts lying on the ground. Collecting this debris is a good sanitation habit but, nonetheless, the highest amount of juglone is in the roots, which run underground. So, what does that mean for the homeowner who has black walnut trees on their property or may want to grow this tree? You must be aware that most grass, shrubs, herbaceous flowers, some trees, and vegetables will not grow near black walnut trees. Vegetables such as asparagus, cabbage, peppers potatoes, rhubarb and tomatoes are sensitive to black walnut tree juglone. Apple trees, blueberry and pear trees are also affected. Azalea, chokeberry, hackberry, hydrangea, lilac, red pine, white pine, Norway spruce, and yew, do not tolerate juglone. However, there are some landscape plants that do tolerate juglone. They include, arborvitae, clematis, crabapple, honeysuckle, most maples, oak, and most viburnum. Flowers that will tolerate the toxic soil are zinnia, Siberian squill, lungwort, bee balm, coral bells and others. Some sources recommend planting 50-80 feet from the tree. The University of Minnesota Extension has a complete list of plants that can be planted near a black walnut tree. The black walnut tree is beautiful in the landscape. But the chemical juglone, that is present in all parts of the black walnut tree, provides a cautionary tale for the suburban gardener. Credits https://extension.umn.edu/managing-woodlands/managing-black-walnut-forests Photo Credit: www.flickr.com (All Creative Commons) (1), Autarmota.blogspot.com (All Creative Commons) (2), www.Marylandbiodiversity.com (All Creative Commons) (3)

< Back American Beech (Fagus grandifolia): An All American! Jim Lakin MD, Dakota County Master Gardener Think of the majestic forests of the early Midwest and you think of glorious beech trees. They and their cousins, the oaks and chestnuts are the noble components of a climax mesic forest. This magnificent tree has a unique trunk and puts on a beautiful show of color in the fall. But there are some things you need to know to grow this tree successfully. Read this article to learn more. Think of the majestic forests of the early Midwest and you think of glorious beech trees. They and their cousins, the oaks and chestnuts are the noble components of a climax mesic forest. In other words, this is what you see in mature, moist old forests that haven’t been ravaged by developers or loggers. Thus, they aren’t that prevalent in the wild. Indeed, when the Midwest was initially settled by Europeans, farmers were quick to notice that beech grew on the best farm soil. You’ll find American Beech mostly in the Eastern Midwest and East coast but they will grow in Zone 4. Southern and east Central Minnesota can host these venerable trees. The Minnesota Landscape Arboretum has some wonderful specimens. a mature American beech Planting sites should be selected with caution. The tree is intolerant of dry conditions. So, a moist, well-drained soil is helpful. Also, when planting west of its native range, a protected site is desirable. As the beech grows, the trunk becomes a smooth, luscious bluish grey. In the fall, American beech puts on quite a show of rich golden to orange-brown foliage. The leaves are quite delicately thin and arranged horizontally to maximize light capture. The American beech is an outstanding shade tree which will reach 60 to 100 feet at maturity. Intense shade is found beneath its canopy, so plan on planting shade-loving plants there. Even fescue grass will be shaded out. spring leaves Unfortunately, the American beech is susceptible to fungal infection. A combination of fungi can cause cankers and ultimately kill the tree. The U.S. Forest Service in cooperation with the Michigan Department of Natural Resources has been working on a disease resistant cultivar . Once established, however the American beech is a magnificent addition to a larger lawn or park Photo Credits: Famartin, Wikipedia (1), Marylandbiodiversity.com (2), Dcrjsr, Wikipedia (3)

< Back Harvest Time with Kids! Sarah Heidtke, Master Gardener It’s time to get the kids in your life ready for harvesting all of the bounty around us. Whether you’ve been tending plants all summer or want to visit any number of “pick your own” locations in our area, harvesting is a great way to connect children to produce right where it grows. Kids of all ages can harvest fruit, vegetables, and herbs! Toddlers can pick a strawberry or a cherry tomato with a little guidance, preschoolers can identify beans to pick, and older kids can reach an apple from the tree or gently pull a carrot from the ground. The best part is that they can see right in front of them where the food comes from and how it is growing just before they pick it. It is important for children (especially our youngest ones) to check with an adult before eating anything they find growing to make sure it’s safe. Getting set up is easy! Young harvesters don’t need fancy gear, but some things may help them enjoy the process more: Tools that fit in their hands - think safety scissors for little hands to clip some basil or chives Gloves - not required, but some kids find that a comfortable and well-fitting pair of gloves make touching plants and dirt easier. Something to carry their bounty - a right-size basket, an empty ice cream bucket, a tote bag, or even a cart to push or wagon to pull. Outside activity items like a hat and water bottle help keep little harvesters going. Where to go? Maybe you have your own container garden, tree, or garden bed that you’ve planted, taken care of, and anticipated harvesting with your children so you don’t need to travel far for your harvest. There are also many places that offer pick your own seasonal produce. Check out https://minnesotagrown.com for a fun location - you can filter by plant and geography to plan a harvest outing that works for you and the children in your life. Does your child have access to a school garden? More and more schools are introducing the benefits of growing and harvesting produce to their students and families, including right here in Dakota County! Check out this link for information on University of Minnesota Extension school garden programs (and more great ideas for gardening with kids) here: https://extension.umn.edu/farm-school/school-gardens What to harvest? Some fruits, vegetables and herbs have been available since late spring and many are coming into a bountiful harvest right now in August, and more will continue through our first freeze in fall. Exact times vary year to year, but here’s a great chart from Minnesota Grown to give you an idea of what’s good eating when you are ready to harvest: https://minnesotagrown.com/whats-in-season/ Looking for ways to enjoy those harvests right away with your young harvest crew? How about pairing carrots, cherry tomatoes, and mini peppers with a little ranch dressing for a quick healthy snack? Apple slices with caramel or peanut butter are delicious! In the fall, carve a pumpkin and roast the seeds for another fun treat. For more ideas, try these “One Bite Lessons” from Life Lab: https://lifelab.org/2021/04/one-bite-lessons/ Food Safety Of course, part of setting up healthy habits for children includes safe handling. Here’s a link to more information about ‘Handling Fresh Fruits and Vegetables Safely,” whether you are eating them right away or preserving for later consumption from University of MN Extension: https://extension.umn.edu/preserving-and-preparing/wash-fresh-fruits-and-vegetables The most important part of harvesting with kids is to set them up for healthy habits as they grow up. Having fun with the garden harvest is a great way to explore new foods at their best. Fortunately, we have many options throughout the growing season here in Minnesota. Happy Harvesting! Looking for books to get little ones excited about the garden harvest or to read after you’ve been out picking your favorites? Here are some suggestions, all available at Dakota County Libraries: Garden time [board book] by Jill McDonald. "Teaches toddlers all about gardens--with easy-to-understand facts about how plants grow and how gardening puts food on our tables.” (Provided by publisher) It's Our Garden: From Seeds to Harvest in a School Garden by George Ancona. “Part celebration, part simple how-to, this close-up look at a vibrant garden and its enthusiastic gardeners is blooming with photos that will have readers ready to roll up their sleeves and dig in.” Garden to Table: A Kid's Guide to Planting, Growing, and Preparing Food by Katherine Hengel with Lisa Wagner. For older kids ready to try out some recipes with their harvest. Photo credits: Sarah Heidtke (1, 2, 3, 4, 5), book covers (6, 7, 8)

< Back Junior Fall Garden Detectives Mary Gadek, Master Gardener The blustery days of fall yield a kaleidoscope of leaves across our Minnesota yards and parks. Have your children ever wondered why these leaves transform to new colors in the fall? Help your child become a Junior Fall Garden Detective by gathering clues, using some scientific observations and then searching outside to solve this mystery of why leaves change colors in the fall. Calling all Junior Fall Garden Detectives! Let’s find out what the clues are for why leaves convert from the summer color of green to red, orange, yellow, or brown shades as they fall to the ground. Once the clues are known, pull on your coziest sweatshirt and head outside to observe the evidence of fall leaves’ transformation, revealed in trees and creatures in our yards and parks. By using your observation skills, you can solve the mystery of why leaves are now changed to a new hue. CLUES Have you ever noticed how the leaves on the trees and bushes seem to suddenly turn from green to deep reds, yellows and oranges seemingly out of nowhere this time of year? Most of the year, the special chemical inside of leaves, called chlorophyll, gives leaves their green tint. The chlorophyll helps leaves absorb energy from sunlight during a process called photosynthesis , which converts the energy into sugar to feed the trees or plants. As the seasons change from summer to fall, the air temperatures drop and the days get shorter. Look for these clues for when leaves will begin to change color: Air temperatures . The Minnesota average temperatures on September 1 are 77 degrees daytime, 59 degrees nighttime. By November 1, the temperatures have decreased to an average of 50 degrees daytime, 35 degrees nighttime. Daylight . From the start of school in early September until now in October, you probably have noticed less daylight each day as you hop on your school bus in the morning until you are playing at the park at the end of the day. Daylight on average decreases by one hour and 15 minutes from August 1 through October 15. As the trees and plants get less sunlight, the chlorophyll in the leaves breaks down. With less chlorophyll, yellow and orange color pigments replace the green color of summer. Sometimes darker red leaves appear as the sugar produced in the leaves stays in the leaves (instead of feeding the tree), because the tree has stopped its growth for the year. EVIDENCE Venture outside to your yard or local park to find the clues of fall to predict when the leaves will be changing colors: the cooler air at your soccer game requiring a need for your favorite sweater and the sun setting earlier over the horizon of the local lake. What evidence do you observe that the clues have encouraged the leaves to start transforming? Trees . Trees and bushes are dropping an array of leaves with bright reds, yellows, oranges and browns. Burning bush (or Euonymus alatus), along with oaks and maple trees create intense red leaves. River birch and yellow poplar trees have showy yellow displays in the fall. Creatures. The arrival of fall invites the creatures in your yard, or local park, to either migrate to the warmer south, or prepare to hunker down for the Minnesota winters by making nests or dens. Birds, like Canadian geese, wood ducks and the loon, form flocks and fly south. Look up to the autumn sky as the migrating birds fly in triangular formation to head to warmer locations. Butterflies, like the monarch, partake in a long journey to winter in warm Mexico. You may notice that the butterflies are no longer to be found in the garden. Other animals, insects and birds remain in Minnesota during the winter by hibernating, or sleeping, in covered areas or under the brush of the colorful fallen leaves and nearby evergreens. Look closely, squirrels are collecting seeds and acorns to save up for their winter meals. SOLVE Want to prove that the fall leaves have been changed due to the cooler air and shorter days? Bundle in a warm jacket and take a hike around your yard and neighborhood with your family or friends. Make sure to get outside during daylight as the sun sets earlier so you can accumulate the evidence of the leaves changing colors. Collect as many leaves as possible or help rake your yard. Notice all the beautiful colors! Have a contest : 1. Who gathered the most leaves? 2. Who picked up the most red/yellow/orange/brown leaves? Celebrate the results by making a leaf pile and jumping in it together! Activity : Find your favorite leaf from your collection. With the help of an adult, cut two equally measured squares of wax paper (about 1” larger than your chosen leaf). Insert the leaf between the two wax papers. With an iron on the lowest setting and a cloth over and underneath the wax papers, briefly hold the iron on the top cloth until the wax papers melt together. What a brilliant fall keepsake you have created! To reinforce the information from this article and to learn more about the concepts, here are some additional resources to explore: Follow the monarch migration: https://journeynorth.org/projects Read: Goodbye Summer, Hello Autumn by Kenard Pak ISBN: 9781627794152 (Dakota County Library) or buy at Amazon: https://www.amazon.com/Goodbye-Summer-Hello-Autumn-Kenard/dp/1627794158 . A children’s book describing the clues and evidence discussed above for fall leaves. References https://weatherspark.com/s/10405/2/Average-Fall-Weather-in-Minneapolis-Minnesota-United-States#:~:text=Daily%20high%20temperatures%20decrease%20by,or%20exceeding%2068°F https://gml.noaa.gov/grad/solcalc/table.php?lat=39.833&lon=-98.583&year=2023 https://twin-cities.umn.edu/news-events/science-behind-fall-colors#:~:text=Our%20research%20showed%20that%20the,develop%20the%20pigments%20each%20fall. https://www.si.edu/stories/why-do-leaves-change-color-fall https://weatherspark.com/s/10405/2/Average-Fall-Weather-in-Minneapolis-Minnesota-United-States#:~:text=Daily%20high%20temperatures%20decrease%20by,or%20exceeding%2068°F https://gml.noaa.gov/grad/solcalc/table.php?lat=39.833&lon=-98.583&year=2023 https://www.dnr.state.mn.us/climate/historical/annual.html https://journeynorth.org/projects Photo credits: Mary Gadek (1,2,3), Book Jacket (4)