Western Mountain Ash vs Red Alder - TreeTime.ca

Western Mountain Ash vs Red Alder

Sorbus scopulina

Alnus rubra

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Western Mountain Ash
Red Alder

Western Mountain Ash is a popular ornamental tree native to the western part of North America. Its attractive, white clusters of flowers bloom in early summer, making way for red, yellow or orange fruit in the fall. If the fruit doesn't catch your eye, Western Mountain Ash's autumn colours will capture your–and the birds's–attention.

Red Alder is a fast-growing deciduous tree native to western North America. Through its nitrogen-fixing roots and nitrogen-rich leaf litter, Red Alder improves soil fertility and supports the growth of surrounding plants. This makes it especially valuable on disturbed sites following logging, construction, or fire. A classic pioneer species, it often colonizes bare ground and enhances conditions for longer-lived conifers to follow.

Red Alder stabilizes soils on streambanks and disturbed slopes, reducing erosion and aiding restoration. It also supports wildlife: birds and small mammals eat the seeds and buds, deer and elk browse the foliage, and bees are drawn to the pollen-rich catkins in spring.

Red Alder also has commercial importance, with its strong yet workable wood widely used for furniture, cabinetry, veneer, and pulp. The tree takes its name from the rusty-red color the bark turns when cut or bruised.

Western Mountain Ash Quick Facts

Red Alder Quick Facts

Zone: 2a
Zone: 5b
Height: 9 m (30 ft)
Height: 15 m (50 ft)
Spread: 6 m (20 ft)
Spread: 9 m (30 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
Growth rate: medium
Growth rate: fast
Life span: medium
Life span: medium
Growth form: upright, rounded to conical
Spreading: seeds - medium, stump sprouting - medium
Suckering: none


Bark: smooth, grey
Flowers: white
Berries: bunches of orange-red berries appear in late summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: AB, BC, SK, MB, YT, NT
Native to: BC
Other Names: cascade mountain ash, greene mountain ash
Other Names: oregon alder, pacific coast alder, western alder