Pacific Rhododendron

Rhododendron macrophyllum D. Don ex G. Don

Heath family

Plant Type

Tree, Shrub

Life Cycle

Perennial

Mature Height

15.0 feet

Spread

6.0 feet

Flower Color

Purple

Bloom Time

Spring

Growing Conditions

Light

Shade Tolerance Intermediate

Water

Water Use High

Drought Tolerance None

Flood Tolerance None

Soil

Soil Types Clay, Loam

CaCO3 Tolerance None

Fertility Need Medium

Stress Tolerance

Fire Tolerance Medium

Salt Tolerance None

Climate

pH Range 5.5 – 7.0

Frost-Free Days 270 days

Precipitation 55 – 125 in

Ecosystem & Wildlife

Pollinators Native Bees; Bombus; Larval Host (Moth)

Larval Host Aseptis binotata, Dysstroma sobria, Hemigraphiphora plebeia, Neoalcis californiaria, Oligia illocata, Orthosia transparens, Synaxis jubararia

Fall Color No

Evergreen Yes

Native Range

CAN: British Columbia
USA: California, Oregon, Washington

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.