< Back Where Do Monarch Butterflies Go in the Winter? Julie Harris, Master Gardener Isn’t it fun to watch colorful butterflies fly from one plant to another in our summer gardens? But what happens to butterflies when the weather gets cold? Read about where Monarch butterflies live in the winter and why they choose that spot. Enjoy fun activities with the child in your life and butterflies. Isn’t it fun to watch colorful butterflies fly from one plant to another in our summer gardens? But what happens to butterflies when the weather gets cold? Well, many butterflies migrate or move from Minnesota to warmer places. In those warmer places, butterflies can also find their food sources – flowers. Since flowers in Minnesota don’t bloom in the winter, butterflies need to fly to areas of the world where they do. Some butterflies who already live in warm climates, will move to a different location because if they stay in one place, butterfly caterpillars will eat all of the available food. Butterflies usually start to migrate in September or October, depending on the weather. Monarch butterflies spend their winter in Mexico and Southern California. (Can you find these places on a map?) Monarch butterflies are the only butterflies to migrate so far away (2,500 miles) each year. In Mexico, the butterflies live in oyamel fir trees and return to the same trees every year. What is really strange, is that these butterflies are not the same butterflies who migrated to these Mexican trees in the prior year. These butterflies were born around mid-August and are the great-great-grandchildren of the butterflies who migrated in the earlier year. So, how do the younger monarchs know which trees to fly to? Scientists think that Monarch butterflies rely on instinct, the sun and magnetic compasses to know where to go. In the spring, the Monarch butterflies fly back to Minnesota because the type of food that they eat is not available to them in Mexico. One sad fact is that the winter homes of the Monarch butterfly are endangered because people are cutting down their favorite trees to build things like roads and houses. In Minnesota, we can help Monarch butterflies to survive by planting milkweed plants and not using poisonous sprays on our plants. References: https://www.learnaboutnature.com/insects/butterflies/do-butterflies-migrate/ https://monarchjointventure.org/monarch-biology/monarch-migration Activity Help your little one appreciate beautiful butterflies by choosing one or more of these activities: Plant a milkweed plant in your garden Go out into the garden and look for butterflies; take a picture and try to identify the type Draw a picture of the life cycle of a butterfly Cut out and decorate paper butterflies Make a butterfly mask Read Gotta Go! Gotta Go! by Sam Swope. This book tells the story of a caterpillar who knew she had to get to Mexico but didn’t know how she would get there. She crawled on her way until she began to grow tired, and hung from a branch, tucked into her chrysalis. When she woke up, she continued her journey until she finally came across a valley with millions of butterflies just like her. Amazon: https://www.amazon.com/Gotta-Go-Picture-Book-Sunburst/dp/0374427860?&linkCode=ll1&tag=wear03e-20&linkId=c6d48ce27484e684775797fa673e9ca4&language=en_US&ref_=as_li_ss_tl Monarch Butterfly by Gail Gibbons. This is a non-fiction book that is clearly written, beautiful illustrated, and packed with scientific facts for kids. This book touches on the life cycle, habitat, migration, body parts, and behavior of monarch butterflies. Dakota County Library Amazon: https://www.amazon.com/s?k=monarch+butterfly+gail+gibbons&ref=nb_sb_noss_1 https://kidworldcitizen.org/books-videos-migration-monarch-butterflies/ Photo credits: pixabay.com (1), Sageandzoo.com Creative Commons (2)

< Back American Holly (Ilex opaca): Deck the Halls! Jim Lakin MD, Dakota County Master Gardener American holly is a tree that breathes festivity! In winter’s white silence, American holly radiates merriment showing red berries on olive green leaves. Boughs often find their way into Christmas wreathes. But this tree is also a great year-round addition to the landscape. Read this article to learn why. It may be August but I’m getting stoked up for the Holidays, thinking about American holly ( Ilex opaca ), a tree that breathes festivity! In winter’s white silence, American holly radiates merriment showing red berries on olive green leaves. Boughs often find their way into Christmas wreathes although this tree is a great year-round addition to the landscape. American holly grows to a height of 15 to 30 feet. Native to the Eastern Coast and nearer Midwest, northern cultivars have spread across Iowa and up into Southern to Central Minnesota. When purchasing American Holly, do be careful to select a cultivar that has proven its hardiness in the Midwest. If you have any questions about that, you might consult the website of the Dawes Arboretum in Columbus, Ohio. They have an excellent collection of over 200 cultivars adapted to the Midwest. Mature American holly When selecting your specimen, you must be mindful that American Holly is dioecious. In other words, there are boy trees and girl trees. So, a male tree must be in the neighborhood for female trees to produce fruit. There are a number of hybrids available commercially. They do grow more rapidly than the native variety. However, they are far less hardy. A severe Minnesota winter can reduce their leaves to a dingy brown, not so festive for Christmas. If you are patient, the native cultivars will slowly grow and demonstrate remarkable hardiness. A few points for siting should be kept in mind. American holly is hardy only to Zone 5. So, in Minnesota it is best to select a protected site from the winter winds. Also, it requires full sun to part shade to thrive. Our hot summers can also affect the tree, so it’s best to site is where it enjoys the afternoon shade. Well-drained soil is a must. It does best in a neutral to acid soil, so amendments should be made if your soil is alkaline. fruit of the female tree If care is taken and patience exercised, American holly will provide great rewards. This stately and colorful tree will bring joy and lift the spirits for many a Holiday Season. Photo Credit: Missouri Botanical Garden (1,2)

< Back What to Do With a Round Zucchini? Joy Johnson, Master Gardener Have you ever been gifted with a vegetable that you didn’t know what to do with? Read this entertaining article to find out what Master Gardener Joy Johnson made with the large, round zucchini she received from a family member. Her clever recipe will inspire you! My brother-in-law stopped by for a visit on Monday. He handed me a round zucchini when he walked in the door with a big grin on his face. I didn’t know what it was at first. It was the size of a cantaloupe, dark green with dark orange stripes. I didn’t believe him when he said it was a zucchini. Have you ever been gifted with an interesting vegetable that you didn’t know what to do with? I gave my neighbor a kohlrabi last summer and she had the same look on her face that I gave my brother-in-law when I handed it to her. I love to share my garden produce and I also enjoy trying new foods and veggies. I watched the large round zucchini for a couple of days as it sat on my counter staring back at me. It seemed friendly enough. I was scheduled to make dinner at my dad’s apartment on Thursday evening. I needed to come up with something I could make at his place that wouldn’t take too long, use too many dishes and utensils but would be healthy and tasty. I grabbed the zucchini, a half-used package of Cotija cheese (that was left from when I made Chile Rellenos), a handful of dried parsley. I stopped at the grocery store and bought a package of Uncle Ben’s Ready Rice (Red Beans & Rice flavor). That is something I’ve never used before. I usually make rice from scratch, but that takes time, and I knew I’d need something with a lot of flavors because zucchini is so mild. I also had a couple of slices of leftover ham. Now I just needed some side dishes to serve with the zucchini. I quickly made a lettuce salad and grabbed some leftover butternut squash. So, this was going to be a summer and winter squash supper! Here's my improvised recipe for the large round zucchini. Ingredients: 1 large round zucchini 1 pack Uncle Bens Ready Rice, Red Beans & Rice flavor 1 handful of dried parsley 2 thick pieces of ham, diced ½ cup Cotija cheese, crumbled Process: Slice the top off the zucchini as if you are going to carve it like a Jack-o’-lantern. Scoop out the seeds and stringy middle flesh and discard. Scoop out a little more flesh so you have about a 2-cup hollow. Cover the zucchini with its lid. Cook it in the microwave or oven until it just starts to get tender. It took mine 20 minutes in the oven, then 5 minutes in the microwave. If you bake it in the oven, put it in a pie plate and add water to the pie plate before putting it in to bake at 350 degrees. Dice the extra zucchini flesh that you scooped out. Cook the rice according to package directions, add the diced zucchini, the handful of dried parsley and the chopped ham. You may need to add 1/3 cup water or broth. You don’t want it soupy, but you need to cook the ham and the diced zucchini. Remove the large round zucchini from the oven or microwave. Scoop the cooked rice mixture into the zucchini, stir in the crumbled cheese, put the lid on it and heat it through in the microwave for about 3-5 minutes. Eat and enjoy! Photo credits: Joy Johnson (1,2)

< Back Eating Winter Melon Looking for a comfort food that can come straight from your garden? Try this recipe using winter melon. Winter melon, also known as ash gourd, is a fruit native to parts of Southern Asia. The fruit grows on a vine and matures into a round or oblong melon that is approximately the same size and color as a watermelon. When it is ripe, it’s exterior turns a greenish-powdery ash-color. It tastes a bit like cucumber and is delicious in the soup described in this article. Anita Oakman, Dakota County Master Gardener Intern Winter melon, also known as ash gourd, is a fruit native to parts of Southern Asia. Winter melon grows on a vine and matures into a round or oblong melon that is approximately the same size and color as a watermelon. When it is ripe, it’s exterior turns a greenish-powdery ash-color. The fruit tastes somewhat like cucumber. It is said to have various health benefits and has been used in Asian medicine and cuisine for centuries. This recipe comes from an Asian-American vlogger named Yi who touts it as being a childhood comfort food for when you have a cold - a sort of “remedy for what ails ya”! Traditional Winter Melon Soup Ingredients: 1 lb winter melon, cut into 1” square pieces 1 lb ground pork Pork seasoning : 1 egg 1.5 tbsp cornstarch 1/4 tsp salt 1 large piece ginger, peeled and sliced 1 smaller piece peeled ginger for grinding or mincing Soup seasoning : 1 tsp olive oil 1 large piece ginger 1 tsp Sichuan peppercorn (optional) 1 tbsp Goji berries 2 tsp salt 1 tsp sesame oil Chopped green onion for garnish Directions: Crack egg into ground pork in medium sized bowl. Season pork with salt and one-half teaspoon cornstarch, mixing in ground or minced ginger until pork sticks together well. Pour olive oil into large saucepan on low heat, add sliced ginger and optional Sichuan peppercorns and heat until mixture becomes fragrant. Add enough boiling water to reach halfway up the sides of the saucepan. Form small meatballs from pork mixture and place into saucepan over increased heat, cooking until soup comes to a boil and meatballs are cooked well. Remove excess grease off top of soup. Carefully add chunks of winter melon to soup, cover saucepan, and let boil for 15 minutes. Stir in Goji berries, salt, and sesame oil. Serve garnished with chopped green onion. Taken from Yi’s Szechuan Kitchen: https://sichuankitchenrecipes.com/2023/11/19/authentic-chinese-winter-melon-soup-recipe/ Reference: https://www.healthline.com/nutrition/ash-gourd Photo credit: Anita Oakman (1)

< Back Snow Mold! It’s Not About Putting Snow in a Mold As the snow begins to melt, you may start to see a grayish, and sometimes pinkish, circular straw-like, matted patch in your yard, especially near the street where snow was piled up for what may have seemed like decades to some but was only a few months. The spot can also have a “webby” fungus appearance. If you have this phenomenon in your yard, then click on this link to learn about snow mold and what you can do to prevent it from happening again next Spring. Janelle Rietz-Kamenar, Master Gardener Snow Mold is a fungus that develops and thrives when early, deep snow covers the ground prior to the ground being frozen. Snow mold can continue to grow once the snow has melted in the Spring as long as the conditions remain wet and cold. There are 2 types of snow mold found in Minnesota: Gray snow mold produces sclerotia which look like dark, hard round bodies on the grass blade. Pink snow mold produces pink-colored spores and fuzzy mycelium. Areas of your lawn that are affected with snow mold will generally take longer to green up in the Spring but usually come back to normal and therefore, is not usually too serious. In a bad weather year, it can, however, kill the grass. If you want to “spring” into Action this Spring: You can choose to break up and spread the larger snow piles around in the affected areas. This will help the snow melt faster and dry out quicker. You can gently rake the area to create a faster drying process and prevent further mold growth. Preparation to avoid snow mold altogether must be done in the Fall with these easy steps: If your yard is prone to snow mold, skip a Fall nitrogen fertilizer which the fungus thrives on. Continue to mow your lawn until the grass stops growing. Cut grass to 2 inches (but not shorter) to prevent the grass from matting and allowing mold to grow. Rake up leaves If you have certain areas in your yard where snow mold is a problem, consider a snow fence to reduce large piles of snow. While snow mold can be a little unsightly in the Spring, a few actions can help alleviate the problem quickly! Source: University of Minnesota Extension: “Snow Mold Prevention Begins in Autumn”, October 20, 2023 Photo Credit: University of MN Extension (1,2)

Subscribe to The Garden Buzz Don’t miss out on the Garden Buzz, the Dakota County Master Gardener’s monthly newsletter bringing you interesting, timely, research-based information on best practices in consumer gardening and caring for the environment. Look for: Master Gardener events What to do in your garden each month Interesting plants that might add value to your garden Plant diseases, insects, or other problems that you might encounter Garden tips Ideas for sharing the joy of gardening with the children in your lives Recipes, gardening books, and other ways that MGs can help you to have a healthy, happy garden. And more!! Get "The Garden Buzz" First Name Last Name Email Sign Me Up Thank you for subscribing to The Buzz!

< Back Our State Fruit: Honeycrisp Apple From mysterious beginnings, to a world-famous apple breeding program at the University of Minnesota, thanks to the research and writing skills of a 4th grade class, the “Honeycrisp” apple became a Minnesota state symbol. Read this article to learn more about the interesting journey of this delicious fruit. Lisa Olson, Master Gardener The road to becoming a state symbol begins with a motivated elementary classroom more often than not. In 2005, at Andersen Elementary School in Bayport, Minnesota, 4th grade teacher Laurel Avery made her students’ education come to life when she directed her class to write a persuasive letter. After learning that another 4th grade class had persuaded the state legislature to proclaim the monarch butterfly the Minnesota state insect several years earlier, Ms. Avery’s class set about researching the perfect candidate for the Minnesota state fruit. Since the University of Minnesota has a world- renowned apple breeding program, the 4th graders came up with an obvious choice: a true Minnesota state fruit, an apple that was created right here in Minnesota and became a favorite around the world; the award-winning “Honeycrisp” apple. While the “Honeycrisp” was “born” in Minnesota, its beginnings were somewhat of a mystery until very recently. For decades, the parentage of the “Honeycrisp” was mistakenly assumed to be the “Macoun” and “Honeygold” apples. This was due to a recordkeeping error in the 1970’s. Imagine thousands of research records dating back to the late 1800’s, the beginning of the University’s apple breeding program. The paper records were haphazardly stored in a fireproof vault. So, it wasn’t surprising that an error had been made in determining the apple’s lineage. Jim Luby, a professor in the Department of Horticultural Sciences, who along with Senior Research Fellow David Bedford, leads the University of Minnesota apple breeding program, tasked librarians and graduate student Nick Howard to sort all of the records and make sense of it all. As they tackled the monumental task, Nick Howard dug even deeper by cross-referencing the data with DNA tests. They ultimately concluded that “Honeycrisp” is the child of “Keepsake” and an unreleased apple “MN1627.” Like humans researching their genealogy, apple DNA testing along with the newly organized handwritten records allowed the apple breeders to trace the “Honeycrisp’s” ancestry all the way back to Europe. James Luby, left, and David Bedford Becoming a world-famous apple doesn’t happen overnight. The “Honeycrisp” was developed in 1960, patented in 1988, and not released until 1991. Here is the typical process: Year 1: Study various cultivars to choose parents with desired characteristics. Hand pollinate the flowers, germinate the seeds, plant the new trees in a greenhouse, and do DNA testing on a leaf from each plant that was grown to see which traits were passed on. Years 2-5: Graft successful matches onto dwarfing rootstocks and allow those trees to grow. First fruit appears at around Year 5. Fruit from every tree is tasted with about only 1 out of every 200 passing the taste test. The rest of the trees are discarded. Years 5-15: The trees that make it to this round of evaluation are cloned by budding/grafting onto common rootstock. For the next 10 to 15 years, these trees are evaluated by looking at 25 desirable characteristics, like texture, flavor, storage ability, disease resistance, etc. Like the previous round, most trees that get to this round will be discarded. Years 15-20: Trees that do make it to this round of evaluations are planted across Minnesota and the U.S. in diverse settings. Researchers see how they perform and if the growers have any interest in the apple. Years 20-25: Commercialization begins with naming, licensing, and distribution to growers to propagate the trees. Years 25-30: About 5 years after commercial growers propagate the trees, consumers can finally have access to the apple. The trees that were the result of the cross of “Keepsake” and “MN1627” that made it through all the rounds of evaluation were a huge success. The apple is grown around the world, and is known as “Honeycrunch” in Europe. The “Honeycrisp” has been described as explosively crisp and juicy. It can last at least 7 months if it is refrigerated. Its harvest season lasts from about September 15 to October 5. And, it is hardy all the way to zone 4. Since the “Honeycrisp” was released over 30 years ago, the next generation of apples with “Honeycrisp” as a “parent” have been released, including “First Kiss” and “Triumph.” Time will tell if they are as well liked as “Honeycrisp.” Thank you to Ms. Avery’s class, who made an excellent choice for their recommendation to the state legislature. Their persuasive writing skills clearly made an impact on their representatives who took their case to the capitol. And though they didn’t see success the first year, the following year as 5th graders, their letters and an apple song they wrote and sang to the tune of the Minnesota rouser convinced the state legislators to adopt the “Honeycrisp” as a fitting symbol of our state. Resources for this article: https://www.leg.mn.gov/webcontent/leg/symbols/fruit.pdf https://mnhardy.umn.edu/honeycrisp https://license.umn.edu/product/honeycrisp-apples---cold-hardy-minnesota-apple https://twin-cities.umn.edu/news-events/apple-day-scientific-way https://www.continuum.umn.edu/2021/10/secrets-of-the-vault/ https://mnhardy.umn.edu/apples https://www.duluthnewstribune.com/lifestyle/state-symbols-are-part-of-what-makes-minnesota-home https://andersen.stillwaterschools.org/our-school/andersen-school-supply-list https://horticulture.umn.edu/news/nicholas-howard-honeycrisp-family-tree https://www.ereferencedesk.com/resources/state-fruit/minnesota.html Photo credits: University of Minnesota Libraries (1), University of Minnesota College of Food, Agricultural and Natural Resource Sciences (2, 3), Anderson Elementary Stillwater Schools (4)

< Back Turkey Wild Rice Soup Joy Johnson, Dakota County Master Gardener It’s chilly outside and a bowl of rich, warm Minnesota style soup along with flavorful sides will certainly warm you up. Luckily, Joy Johnson has provided a luscious recipe for wild rice soup made with Minnesota grown wild rice. If you had Joy’s foresight, you could add dried parsley to the soup and roasted sweet potatoes from your storage cabinet. Hungry yet? Read on to learn how to warm your kitchen (and tummy) with these recipes. It’s chilly outside and a bowl of rich, warm Minnesota style soup along with flavorful sides will certainly warm you up. The soup can be made with any type of milk, including non-dairy. I love using Minnesota grown wild rice, it is so flavorful and has a wonderful texture. Make sure to thoroughly cook it following package directions. I don’t have anything growing in the garden right now, but I do have delicious turkey stock and cut up turkey meat, both light and dark, frozen from the holidays. I dried a lot of parsley prior to frost, so that can be added to the soup too. I have fresh sweet potatoes from the garden stored and I’ll roast those to serve along side this soup. A cold turkey croissant sandwich with fresh greens is one of my favorites. A very special treat for this meal, is my daughter’s home-made goat milk cheese. It has a sharp pungent flavor and is delicious atop a nutty cracker with a dollop of cranberry sauce. Ingredients ½ cup butter cubed 2 carrots, finely chopped 2 celery ribs, finely chopped 1 medium onion, sweet white, chopped ½ cup all-purpose flour 4 cups turkey broth (or chicken) 2 cups wild rice, cooked 2 cups cubed cooked turkey 2 cups half-and-half cream 1 teaspoon dried parsley flakes 1.2 teaspoon salt ¼ teaspoon pepper Process In a Dutch oven, heat butter over medium-high heat. Add carrots, celery and onion; cook and stir until tender. Stir in flour until blended; cook until bubbly. Gradually stir in broth. Bring to a boil, stirring constantly; cook and stir 1-2 minutes or until thickened. Stir in remaining ingredients; return to a boil. Reduce heat; simmer, uncovered, 20 minutes, stirring occasionally. Roasting Sweet Potatoes Ingredients 4 sweet potatoes, peeled and cut into 1-inch cubes ¼ cup olive oil ¼ cup honey 2 teaspoons ground Cinnamon Salt Process Preheat oven to 375 degrees F. Lay the sweet potatoes out in a single layer on a roasting tray. Drizzle the oil, honey, cinnamon, salt and pepper over the potatoes. Roast for 25 to 30 minutes in oven or until tender. Take sweet potatoes out of the oven and transfer them to a serving platter. Drizzle with more extra-virgin olive oil. Photo Credits: www.flickr.com (1), Joy Johnson (2)

< Back Early Spring Blooming Plants Deep in the doldrums of winter, everyone is anxious for spring weather to arrive so that, once again, they can dig in the dirt planting flowers and vegetables. To entice us even more, we’re seeing bulb plants in the stores for sale so we can enjoy them at home until spring finally arrives. In this article, I’ll talk about some of the most popular spring blooming plants for your garden. Carolyn Plank, Master Gardener Deep in the doldrums of winter, everyone is anxious for spring weather to arrive so that, once again, they can dig in the dirt planting flowers and vegetables. To entice us even more, we’re seeing bulb plants in the stores for sale so we can enjoy them at home until spring finally arrives. In this article, I’ll talk about some of the most popular spring blooming plants for your garden. CROCUS is one of the first bulb plants to peak its head up in early spring. They are a very reliable plant and frost tolerant. They grow 3-6” tall and are available in multiple colors in shades of purple, orange, pink, and white. They like full sun to part shade and prefer a slightly neutral soil pH of 6.0-7.0, but well-draining soil is very important. DAFFODILS are also an early spring plant best known for their bright yellow trumpet shaped flower. They grow in clumps and unlike tulip bulbs, they have little appeal to wildlife. Planting them amongst snowdrops, hyacinths and tulips provides a wonderful array of colors. They tolerate full sun to part shade with a slightly neutral pH soil (6.0-7.0). DWARF IRIS is a fragrant miniature plant that blooms early in the season and grows to about 6-8”. They bloom in two waves in various shades of dark to light blue, and purple making them ideal for borders. They prefer full sun to part shade, good soil drainage, and spread through underground rhizomatous stems filling the garden with beautiful spring blooms. HYACINTH loves full sun to part shade in a well-drained soil with pH close to neutral (7.0). This plant is well suited to Zones 4-8 and range in height from 6-12”. This plant has a very fragrant flower with tiny blooms resembling bunches of grapes. TULIPS bloom early in the spring season along with daffodils and crocus. They do best in full sun and well-drained soil with a pH of 6.0-6.5. Colors include orange, pink, purple, red, white, yellow and numerous multi colors that grow to 12-18” tall. EASTER LILY – Lilies are very flamboyant with beautiful flowers and an intensely sweet fragrance. Easter lilies are white in color although there are numerous types of lilies such as Asiatic and Oriental hybrids that come in many colors. The lily is an upright perennial that ranges in height from 2-8’ tall. Don’t forget, once that easter lily is done blooming, cut the stems down and plant the bulb in the garden so you can enjoy it again next spring. Lilies grow best in slightly alkaline (6.5-7.0) moist, well-drained soil high in organic matter. Fall is the time to plant the bulbs for most of these plants, so, if you haven’t planted any of these spring delights in your garden yet, I hope you are inspired to do so this year. Then look forward to a rainbow of color in the spring. Photo Credits: Carolyn Plank (1), University of Minnesota Extension (2), Julie Weisenhorn, University of Minnesota Extension (3), Woodies Garden Goods (4 - Creative Commons License) (4), Pixnio (Creative Commons License) (5), MaxPixel (Creative Commons License) (6)

< Back Fall Lawn Care Margie Blare, Master Gardener Fall is the best time to prepare for next year’s healthy lawn. Most lawns in Minnesota have cool weather grasses such as Kentucky bluegrass, tall and fine fescues and perennial ryegrass. Renovation Fall can be a great time to renovate your lawn. Seeding is easier because the seedlings won’t experience as much heat stress. Avoid adding additional nitrogen as it will over-stimulate the existing grass, thereby crowding out the new seedlings. Fine fescues will use less water, and tall fescues have longer roots. Figuring out why your lawn isn’t doing well before renovating it, will save you time and money. Go to: https://extension.umn.edu/lawn-care/renovating-lawn-quality-and-sustainability for more information. If you are laying down sod it, too, benefits from cooler temperatures in the fall and will require less water. Fertilization When temperatures are between 50 and 75 degrees your grass starts storing nutrients in its roots, to be used next spring, so late August through mid October is the optimal time to fertilize. Applying fertilizer in the spring leads to fast growth that suffers in the summer heat. Applying it after the ground is frozen creates run-off pollution and wastes your money. You should start with a soil test (go to: https://soiltest.cfans.umn.edu/ or e-mail soiltest@umn.edu ) before applying fertilizer. Weed Control Fall can also be a great time to kill those perennial broad-leaf weeds. They, too, are storing nutrients in their roots, so taking care of them in the fall eliminates them next spring. If using an herbicide (or fertilizer), always read ALL the instructions and follow recommendations for application rates, weather conditions and personal protection. Spot-treating may be the most economical and safest way to apply broad-leaf weed control products. Herbicide/fertilizer combination products can compromise both the fertilizer and the weed control effectiveness due to the ‘water-in’ vs. ‘leave-on-the-leaf” instructions. Crabgrass sprouts earlier in the year, so don’t use a crabgrass pre-emergent product in the fall. Go to: https://extension.umn.edu/planting-and-growing-guides/lawn-care-calendar for more information. Mowing Continue mowing until the grass stops growing, sometime in October. Make sure your mower blades are sharp and remove no more than the top 1/3 of grass length in any one mowing. During warm weather 3-4” long grass keeps the ground moister. But if you leave it long over the winter it becomes a vole paradise! Leaving (small) grass clippings on your lawn returns their nitrogen to the lawn and mulching blades help keep the clippings small. Bee Lawns Bee populations have been declining in part due to habitat loss and pesticide use. Having flowering plants in a lawn will help bees, and you also increase your lawn’s resilience; it will have healthier soil and need less watering, mowing, and fertilizer. White clover, Creeping thyme, Self heal, and Ground plum are low-growing flowers that tolerate mowing down to 3 inches. Turf areas that have little foot traffic or that are primarily aesthetic are great locations. Examples are: steep slopes, right of ways or easements. Do not use broad-leaf weed control on Bee Lawns: it will kill all the flowers that the bees need. Spot treat very carefully. Go to: https://bluethumb.org/turf-alternatives/pollinator-lawn/ for more information. Photo credit: University of Minnesota Extension

< Back The Effects of Drought on Trees Lisa Olson, Master Gardener I have heard it said tongue in cheek that Minnesota’s average weather is the midpoint between two ridiculous extremes, because when we talk about averages, it can be misleading. Sometimes it happens that one huge deluge of rain will offset a long dry spell, at least on paper, where the average rainfall for the month or year may appear as normal in the record books. But those long drought periods are not so easily erased in the lives of the trees. According to the US Forest Service, healthy trees mean… Healthy people: 100 trees remove 53 tons of carbon dioxide and 430 pounds of other air pollutants per year. Healthy communities: Tree-filled neighborhoods lower levels of domestic violence and are safer and more sociable. Healthy environment: One hundred mature trees catch about 139,000 gallons of rainwater per year. Homeowner savings: Strategically placed trees save up to 56 percent on annual air-conditioning costs. Evergreens that block winter winds can save 3 percent on heating. Better business: Consumers shop more frequently and longer in tree-lined commercial areas and are willing to spend more. Higher property values: Each large front yard tree adds to a home’s sale price. One thing that helps to keep trees healthy is a consistent, sufficient amount of rainfall. Extended dry periods, even if followed by enough rain to offset the deficit in the record books, will still have a detrimental effect on trees. During an extended dry spell, young trees will be the first to show the effects, while older, mature trees with large root systems may take three to five years to show outward signs of drought effects and at that point it may be too late for them to recover. Additionally, droughts are getting worse. Due to global warming, the increase in average temperature amplifies the effects of drought. Hot and dry is much worse than cool and dry. Higher temperatures mean evaporation increases which means soil dries out faster and trees transpire more. As a result, trees have evolved strategies to cope with drought conditions. One strategy a tree may employ is to close its stomata, or leaf pores, to minimize transpiration. Transpiration is the evaporation of water in plant leaves. A large oak tree can give transpire a whopping 40,000 gallons of water per year. 10% of the moisture in the atmosphere comes from transpiration. With the pores closed, besides preventing transpiration, the tree is unable to take in carbon dioxide which is critical to the process of photosynthesis. Without the ability to make food, it becomes dependent on the energy it has stored to keep itself alive. Symptoms can include scorched, wilted, or rolled leaves, or early fall color. A tree may drop some or all of its leaves to further prevent transpiration. As a tree uses up its reserve energy, growth will stop and twigs and branches begin to die back. Symptoms of drought stressed trees will occur from the top of the tree down, and from the outside toward the center. In other words, the extremities are the first areas to show damage. Damage caused by drought may not show up until the winter when a normally resilient tree becomes affected by sunscald, frost-splitting, or its weakened branches break from heavy snow. Another secondary effect of drought is that a weakened tree is more susceptible to disease and insect damage. Widespread areas of damage from emerald ash borer or diseases like oak wilt or other diseases are more prevalent when trees are stressed. One area of damage on a tree cannot be easily observed for damage. Most tree roots are in the top six to 24 inches of soil making them extremely vulnerable to dry periods. https://hort.ifas.ufl.edu/woody/root-growth-lateral4.shtml This leads us to what we can do to minimize the effects of drought on our trees. Water using good practices. Slow, deep watering is critical. Water every five to seven days or more often if the temperature soars above 95 degrees. Place a shallow can where you are sprinkling to be sure at least two inches of water are slowly applied. Be sure to water the entire root area. Roots spread at least two to three times farther than the dripline of the tree. Another factor regarding watering is that any plants growing above the tree roots are also competing for water, so increase the amount of water if other plants are present and be sure to remove any weeds. A couple inches of mulch, but not touching the base of the tree, is a good alternative to grass under a tree. The best way to see if water is getting to the roots is to dig a hole approximately 10 inches deep to see if a sufficient amount of water is getting down to that depth from your watering. An area of heavy clay soil may seem saturated if the water is puddling, but in fact the water may just be sitting on the surface as it takes a long time for water to infiltrate clay. Young, newly planted trees will need more frequent watering until their roots are developed. The Minnesota Department of Natural Resources put together this video How to Water a Tree for tips on watering newly planted trees. While it may be tempting to water a little bit every day instead of deep watering once a week, shallow watering will cause the roots all to move closer to the surface where they are more likely to be affected by the extreme weather conditions and unable to grow deeper where more water may be available. For best results, water in the morning and consider using a soaker hose. Avoid pruning stressed trees. Healing the wounds uses up the energy the tree is trying to conserve just to survive. If you are planting new trees, choose your plant wisely. Always consider the site where the tree will be living and select a plant that can tolerate the conditions. If you are interested in learning more about the effects of drought on trees, the links below include helpful information! https://www.fs.usda.gov/learn/trees https://www.dnr.state.mn.us/climate/journal/drought_monitor.html https://news.iu.edu/live/news/28084-young-trees-more-susceptible-to-drought-but-also https://extension.colostate.edu/topic-areas/yard-garden/healthy-roots-and-healthy-trees-2-926/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4518277/ https://environment.yale.edu/news/article/brodersen-drought-and-tree-mortality-science-reveals-harsh-future-for-forests https://www.mass.gov/doc/citizen-forester-june-2017/download https://extension.illinois.edu/blogs/ilriverhort/2016-07-08-drought-impacts-trees-years-come#:~:text=Many%20trees%20will%20take%20three,to%20insect%20and%20disease%20infestations . https://ag.umass.edu/landscape/fact-sheets/long-term-drought-effects-on-trees-shrubs https://hort.ifas.ufl.edu/woody/root-growth-lateral4.shtml https://extension.umn.edu/how/water-wisely-start-your-own-backyard https://extension.umn.edu/my-minnesota-woods/caring-trees-dry-weather https://extension.umn.edu/natural-resources-news/avoid-pruning-drought-stressed-trees https://extension.missouri.edu/news/how-to-help-your-trees-recover-from-drought-5728 https://www.noaa.gov/jetstream/ll-leaf Photo Credit: National Drought Mitigation Center (1), University of Minnesota Extension (2), Lisa Olson (3), University of Florida (4)

< Back Sunburned plants This article provides advice about how to recognize sunburned plants (sunscald), how to prevent it and what to do if your plants suffer from it. Marjory Blare, Master Gardener Many plants in your vegetable garden can get sunburned! For instance, vegetables and fruit can burn if the canopy of leaves over them is removed or if they are placed outside without being hardened off. House plants will suffer if moved from a shady room to a sunnier room. Sunscald is a synonym of sunburned. How to recognize sunburn/scald Look for: sunken bleached spots on fruits and vegetables; brown areas on pome fruits such as apples; or whitish, yellowish or browned foliage. Some things to do to prevent sunburn or sunscald 1) Harden-off plants before moving them to a sunnier location. Over the course of about 5-10 days, let them have longer and longer exposure to the sun (and wind). This goes for houseplants moving to a sunnier room or outside, as well as seedlings and plants grown in a greenhouse. 2) Plant out on an overcast day, if possible. 3) Water thoroughly before and after planting out. 4) In the case of house plants, research ideal light conditions and then observe the new location for several days in advance of moving them. 5) Water in the morning, and water at the root instead of the foliage. Water on leaves can magnify the sun to cause damage. 6) Be careful to not remove foliage shading immature fruit/vegetables when harvesting; this will let the sun reach areas that aren’t used to it. 7) Research whether your fruit/vegetable will continue ripening after picking and possibly pick them a little early, then promptly get them into the shade or a cooler place. 8) Try a different variety if you notice lots of sunscald this year. 9) Mulch freshly planted starts to conserve moisture, and facilitate root growth. 10) Do not fertilize right away; a high nitrogen fertilizer will direct energy into the leaves before the roots can settle in. 11) Kaolin- based products such as Surround® can reduce the chances of sunburn. Read the label for proper application rates and personal protective equipment. The label for Surround WP® includes language about reducing sunburn damage, but Surround CF® doesn’t. This product covers the surface of the fruit with clay. The clay will reflect the sunlight and reduce the sunlight that reaches the fruit. Kaolin should be applied to the point of near-drip coverage. Be careful to leave enough foliage free of the kaolin for photosynthesis. Check label for organic certification. Read more about the use of Kaolin from Purdue University here: https://vegcropshotline.org/article/sunburn-on-vegetables/ 12) Prune carefully to leave enough foliage to shade the fruit/vegetable. Prune diseased foliage promptly. 13) Water deeply. 14) Sheer curtains in the window can help house plants deal with too much light. 15) Use a shade cloth or bamboo screen to throw some shade during the hottest part of the day, and growing season. Shade cloth differs in the amount of shade that is thrown. A 70% cloth will let 30% of the light through. There is no one, right, answer to which percentage your garden needs. I used an orange snow fence last summer. Some things you can do after a plant shows sunburn/sunscald 1) Move plants (if possible) to a less exposed site. 2) Cut fertilizer rates to half strength until new leaf growth shows. 3) For tomatoes, try to keep temperatures below 95 degrees Fahrenheit. Tomatoes are native to alpine regions in Central and South America. The hottest days of Minnesota’s growing season can be hard on tomatoes. Try a shade cloth or bamboo screen to keep the tomatoes cooler during the hottest parts of the day. 4) Remove damaged fruit or leaves so that the plant can use its energy to grow more fruits, vegetables or leaves. 5) Be patient. Planning to prevent sunburn/scald before it can happen will lead to a happy productive garden! Read more from UMN here: https://extension.umn.edu/yard-and-garden-news/gardens-get-sunburned-too Read more from Michigan State here: https://www.canr.msu.edu/news/hot_and_sunny_days_promote_sunscald_in_peppers_and_other_vegetables Photo credits: Marjory Blare (1, 3), Dreamtime.com (2), istockphoto.com (4)