Rocky mountain iris
Iris missouriensis
USDA zones3 to 8
SunHandles full sun to partial sun
WaterHandles moderate to wet soil
Size12 to 24 inches tall9 to 12 inches wide
- Habit
- Herb
- Bloom season
- Spring, summer
- Bloom color
- Violet blue
- Foliage color
- Green
- Soil types
- Loam
- Soil pH
- Acid, neutral
Garden uses
Attracts
Notes
Rocky mountain iris (Iris missouriensis) is a perennial for borders, meadows, and low maintenance gardens. It is hardy to USDA zone 3, or down to -40°F (-40°C). This plant likes full or part sun and average to wet, loamy soil. Violet blue flowers are lightly fragrant and attract hummingbirds. Deer tend to browse other plants first. The clumps spread to form colonies, so divide them regularly.
Pairs well with Pickerel weed, Royal fern, and Foxtail barley.
Native range
Western and central North America.