Browse Trees

Red Alder

Alnus rubra

Native to Pacific Northwest Valuable to wildlife

Characteristics:
A great native tree for yard and wet locations, such a rain gardens.

Growing Conditions:
Sun, used in difficult wet sites such as those along highways, in parks and other large areas, does well in infertile areas and has the ability to fix nitrogen.

Uses:

Height:
40' at maturity

Width:
35' at maturity

Shape:
Broadly pyramidal

Flowers:
Catkins about 10 cm long

Leaves:
Leaves alternate, simple, oval and tapered from the middle to both ends, dull dark green above

Bark:
Young bark is a gray green or greenish brown that changes to a polished brown with age

The ability of red alder to fix atmospheric nitrogen can result in increases in both nitrogen content and its availability in the soil.