White Alder
Alnus rhombifolia Nutt. - Birch family
Size
Mature Height: Up to around 65.0 feet
Planting Distance: 10.4 feet
Plant Type: Tree
Root Depth: 12 inches
Growth Form: Multiple Stem
Growth Rate: Rapid
Features
Flower Color: Green
Conspicuous Flowers: No
Bloom Time: Fall
Seasonal Growth: Spring and Summer
Evergreen: No
Fall Colors: No
Conditions
Shade Tolerance: Tolerant
Clay Soil Tolerance: Yes
Sandy Soil Tolerance: Yes
Drought Tolerance: Low
Flood Tolerance: Low
Fire Tolerance: Low
Salt Tolerance: None
Ecosystem Interactions
Pollinators: Larval Host (Butterfly); Larval Host (Moth); Wind
Larval Species depending on White Alder: Acronicta grisea, Archips rosana, Dasychira vagans, Nola clethrae, Papilio rutulus, Phyllonorycter incanella, Synanthedon culiciformis
Native Range
- USA: California, Idaho, Montana, Oregon, Washington
- MEX: Mexico Northwest
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.