Red Alder
Alnusoregana

Family: Betulaceae (beh-tyoo-LAY-see-ee)
Genus: Alnus (AL-nus)
Species: oregana (or-reh-GAH-nuh)

Category
Trees

Water Requirements
Requires consistently moist soil; do not let dry out between waterings

Sun Exposure
Sun to Partial Shade
Light Shade
Partial to Full Shade

Foliage
Deciduous

Foliage Color

Height
30-40 ft. (9-12 m)
over 40 ft. (12 m)

Spacing
20-30 ft. (6-9 m)

Hardiness
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)

Where to Grow

Danger

Bloom Color

Bloom Characteristics

Bloom Size

Bloom Time

Other details

Soil pH requirements
4.5 or below (very acidic)
4.6 to 5.0 (highly acidic)
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information

Propagation Methods

Seed Collecting