Rocky Mountain Iris

Iris missouriensis Nutt. - Iris family

Size

Mature Height: Up to around 12 inches

Planting Distance: 12 inches

Plant Type: Forb/herb

Root Depth: 6 inches

Growth Form: Colonizing

Growth Rate: Rapid

Features

Flower Color: Purple

Conspicuous Flowers: Yes

Bloom Time: Spring

Seasonal Growth: Summer

Evergreen: No

Fall Colors: No

Conditions

Shade Tolerance: Intermediate

Clay Soil Tolerance: Yes

Sandy Soil Tolerance: Yes

Drought Tolerance: Low

Flood Tolerance: High

Fire Tolerance: High

Salt Tolerance: None

Ecosystem Interactions

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

Larval Species depending on Rocky Mountain Iris: Amphipoea keiferi

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.