Red Alder

Alnusoregana

Family
Betulaceae (beh-tyoo-LAY-see-ee)
Genus
Alnus (AL-nus)
Species
oregana (or-reh-GAH-nuh)
Synonym
Sun Exposure
Sun to Partial Shade
Light Shade
Partial to Full Shade
Foliage
Deciduous
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)
Bloom Color
Bloom Time
Other Details
Category
Trees
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
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
Regional

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Gardener's Notes:

0
positive
1
neutral
0
negative
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Lakemont, GA (Zone 8a) | March 2007 | neutral

Alnus oregona (rubra) RED ALDER Dec (z7) (WNa,Cut)
"One could not ask for a lovelier sylvan presence"(Peattie); large NW tree whos...Read More

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