Western blue flag is a native iris that has a range that includes western and central North America. This showy species spreads by tuberous rhizome in moist locations. In its native habitat it is found growing along streams and in wet meadows, most commonly in grassy, open habitat, from the coast to high elevations. Although it prefers moisture and wetland conditions, once established it can tolerate some drought conditions in late summer after blooming. The large, violet blue flowers are attractive to pollinators, including hummingbirds. The flowering stalks grow up to 1.5′ tall. Western blue flag flowers in late spring to early summer depending on elevation. It is tolerant of full sun to part shade and is deer resistant.
Iris missouriensis seed packets contain 1/4 teaspoon of seed.
Seed Germination Instructions
90 days cold-moist stratification. Sow seeds outside in fall.