Straight Info on Zigzag Iris: Iris brevicaulis
By Jim Lakin, MD, Master Gardener
There are many beautiful varieties of iris that you can choose from for your garden. This article discusses one type of iris that may not be as well known but definitely deserves your consideration - the zigzag iris. The zigzag iris is a native usually found in moist areas of the wild. When they bloom in the spring they put on a striking display of blues and yellows. If you are looking for a gorgeous springtime accent to your pond or stream side or the more moist areas of your garden, Zigzag iris is sure to be a stunning addition.
The zigzag iris - given the effort put into creating a staggering variety of iris cultivars, it is amazing how beautiful this native creation is. It’s not “gussied up” with carefully selected genetic traits. Rather its genome has been perfected by thousands of years living on the prairie’s pond sides and river banks. As you might expect, zigzag iris is a hardy and prolific fellow. Although it is usually found in the wild in moist areas of woodlands or by water, it grows quite well in normal garden soil. Native to the Central states of North America it is hardy from USDA Zones 4 to 8, although its natural occurrence in Ontario would make me think you folks up in Duluth can probably plant them in sheltered areas.
Zigzag iris blooms in the spring from April to early July, producing blooms ranging in color from violet-blue, to lavender, to purple-blue, to bright blue to blue, and pale blue with yellow and white crested falls (the petals that hang downward). These fellows usually range from 9 to 12 inches in height so you usually don’t have to stake them like their gargantuan German bearded iris cousins. They also spread about 9 to 12 inches. Zigzag iris does best in full sun, (greater than 6 hours of direct sun) but will also do pretty well in part shade (2-6 hours).
The plant gets its common name from the peculiarities of its stem. The flower usually is at a 45 degree angle to it. It not infrequently pops up in local nurseries although it is sometimes referred to as Lamance iris or Short-stemmed iris.
The easiest way to propagate zigzag iris is by dividing its rhizomes. This is best done from late summer to early spring when the plants are dormant. You will want to dig them in about 6 inches with lots of organic material to promote root growth. If fertilizing this is best done in the very early spring. Be patient as it can take 3 to 4 years until you get good flowering. Once established they usually require little maintenance aside from some division after 4 to 5 years. Deer usually don’t bother them too much. It depends on how hungry they are!
So, if you are looking for a gorgeous springtime accent to your pond or stream side or the more moist areas of your garden, Zigzag iris is sure to be a stunning addition.
Photo credits: Eric Hunt Wikimedia Commons (1), Addisonia, Wikimedia Commons (2)