Diablo Ninebark vs Red Alder - TreeTime.ca

Diablo Ninebark vs Red Alder

Alnus rubra

Physocarpus opulifolius Diablo

CUSTOM GROW

Red Alder
Diablo 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.

Diablo Ninebark is a small, low maintenance, multi-stemmed shrub, that is used to add texture or color to any yard. This plant grows dark purple leaves in the spring and grows slightly faster than Common Ninebark. It features flaky red to brown bark, clusters of white flowers, and long, maple-like leaves. Diablo Ninebark can make a dense and colorful hedge, or it can be an attractive ornamental by itself.

Red Alder Quick Facts

Diablo Ninebark Quick Facts

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Zone: 5b
Zone: 3a
Height: 15 m (50 ft)
Height: 2.4 m (8 ft)
Spread: 9 m (30 ft)
Spread: 1.8 m (6 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: short
Growth form: upright, rounded to conical
Spreading: seeds - medium, stump sprouting - medium
Suckering: low
Maintenance: medium


Foliage: reddish-purple
Fall colour: yellow
Bark: smooth, grey
Bark: brown to red, exfoliating
Flowers: white
Berries: red
Seeds: inflated seed capsules
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


Native to: BC
Other Names: oregon alder, pacific coast alder, western alder
Other Names: eastern ninebark, purple ninebark