Ninebark vs Red Alder - TreeTime.ca

Ninebark vs Red Alder

Alnus rubra

Physocarpus opulifolius

CUSTOM GROW

CUSTOM GROW

Red Alder
Ninebark

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.

Ninebark is a small, multi-stemmed shrub, that is used to add texture or colour to any yard.

It features flaky, cinnamon-brown bark, attractive white flowers, and long, maple-like leaves.

Red Alder Quick Facts

Ninebark Quick Facts

Zone: 5b
Zone: 2a
Height: 15 m (50 ft)
Height: 2.1 m (7 ft)
Spread: 9 m (30 ft)
Spread: 2.1 m (7 ft)
Light: partial shade, full sun
Light: full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: fast
Growth rate: slow
Life span: medium
Life span: long
Growth form: upright, rounded to conical
Spreading: seeds - medium, stump sprouting - medium
Suckering: none


Bark: smooth, grey
Flowers: small white clusters
Berries: small pink to purple berry like follicles
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


Native to: BC
Native to: ON, QC, NS, NB
Other Names: oregon alder, pacific coast alder, western alder