Highbush Cranberry vs Red Alder - TreeTime.ca

Highbush Cranberry vs Red Alder

Alnus rubra

Viburnum opulus var. americanum (trilobum)

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Red Alder
Highbush Cranberry

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.

Highbush Cranberry produces attractive white flowers in late June and bears edible fruit that matures to a bright red colour in the late summer.

This shrub, native to much of Canada, is fast growing, and its fruit can be eaten raw or cooked into a sauce.

Red Alder Quick Facts

Highbush Cranberry Quick Facts

Zone: 5b
Zone: 2a
Height: 15 m (50 ft)
Height: 4 m (13 ft)
Spread: 9 m (30 ft)
Spread: 2.7 m (9 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: normal
Growth rate: fast
Growth rate: medium
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 clusters
Berries: edible red berries
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


In row spacing: 0.6 m (2.0 ft)
Between row spacing: 5 m (16 ft)
Native to: BC
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, PE
Other Names: oregon alder, pacific coast alder, western alder
Other Names: american cranberrybush, american cranberrybush viburnum, high bush cranberry, kalyna