Douglas' Onion

Allium douglasii Hook.

Lily family

Plant Type

Forb/herb

Life Cycle

Perennial

Mature Height

11 inches

Spread

20 inches

Flower Color

Purple

Bloom Time

Late Spring

Growing Conditions

Light

Shade Tolerance Intolerant

Water

Water Use Medium

Drought Tolerance Medium

Flood Tolerance Low

Soil

Soil Types Clay, Loam, Sand

CaCO3 Tolerance Medium

Fertility Need Low

Stress Tolerance

Fire Tolerance High

Salt Tolerance None

Climate

pH Range 6.0 – 7.8

Frost-Free Days 100 days

Precipitation 8 – 16 in

Native Range

USA: Oregon, Washington

Regional Native Status: L48 (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.