Western Sweetroot

Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr.

Carrot family

Plant Type

Forb/herb

Life Cycle

Perennial

Mature Height

4.0 feet

Flower Color

Yellow

Bloom Time

Spring

Growing Conditions

Light

Shade Tolerance Tolerant

Water

Water Use Medium

Drought Tolerance High

Flood Tolerance None

Soil

Soil Types Clay, Loam, Sand

CaCO3 Tolerance Low

Fertility Need Low

Stress Tolerance

Fire Tolerance High

Salt Tolerance Low

Climate

pH Range 5.2 – 7.5

Frost-Free Days 110 days

Precipitation 16 – 35 in

Ecosystem & Wildlife

Pollinators Larval Host (Moth)

Larval Host Agonopterix rosaciliella, Greya variata

Fall Color No

Evergreen No

Native Range

CAN: Alberta, British Columbia
USA: California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming

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.