Rocky Mountain Iris

Iris missouriensis Nutt.

Iris family

Plant Type

Forb/herb

Life Cycle

Perennial

Mature Height

12 inches

Spread

12 inches

Flower Color

Purple

Bloom Time

Spring

Growing Conditions

Light

Shade Tolerance Intermediate

Water

Water Use High

Drought Tolerance Low

Flood Tolerance High

Soil

Soil Types Clay, Loam, Sand

CaCO3 Tolerance High

Fertility Need Low

Stress Tolerance

Fire Tolerance High

Salt Tolerance None

Climate

pH Range 7.0 – 8.5

Frost-Free Days 115 days

Precipitation 24 – 35 in

Ecosystem & Wildlife

Pollinators Native Bees; Bombus; Butterflies; Larval Host (Moth); Hummingbirds

Larval Host Amphipoea keiferi

Fall Color No

Evergreen No

Native Range

CAN: Alberta, British Columbia
USA: Arizona, California, Colorado, Idaho, Montana, Nebraska, Nevada, New Mexico, Oregon, South Dakota, Utah, Washington, Wyoming
MEX: Mexico Northeast

Regional Native Status: L48 (N), CAN (N)

State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.