Common Caragana vs Mountain Alder - TreeTime.ca

Common Caragana vs Mountain Alder

Alnus incana subsp. tenuifolia

Caragana arborescens

CUSTOM GROW

Mountain Alder
Common Caragana

Mountain Alder is a native cold-hardy shrub or small tree often found along streams and in moist forested habitats. Its nitrogen-fixing ability enriches soils and supports surrounding vegetation, while its extensive root system helps stabilize streambanks and slopes. The fast growth rate allows it to establish quickly on disturbed sites, making it especially valuable in reclamation, restoration, and erosion control projects.

Often forming dense thickets, Mountain Alder enhances habitat quality in riparian and upland areas. It provides food and cover for various wildlife, including birds and small mammals. Recognized as an important species for soil and water conservation, it is well suited for riparian planting, naturalization, and ecological restoration.

Note: We use Sitka Alder for Alnus incana subsp. tenuifolia. This species is also known by many other common names, including Grey Alder, River Alder, and others. Please confirm the scientific name to ensure you are ordering the correct plant.

Common Caragana is a fast growing shrub that's known for its exceptional hardiness and drought tolerance. Although it's most commonly planted in shelterbelts, Common Caragana is also an excellent hedge or feature shrub.

Note: in warmer areas, this species can be difficult to contain once planted. Use the right plant in the right place.

Mountain Alder Quick Facts

Common Caragana Quick Facts

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Zone: 1a
Zone: 1b
Height: 6 m (20 ft)
Height: 4 m (13 ft)
Spread: 3 m (10 ft)
Spread: 1.5 m (5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: medium
Growth form: multi-stemmed, thicket-forming
Spreading: rhizomes - medium, seeds - low, layering - low
Suckering: none
Maintenance: medium


Bark: smooth, gray to brown
Flowers: yellow, in spring
Fruit: pod like fruits
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


In row spacing: 0.3 m (1.0 ft)
Between row spacing: 5 m (16 ft)
Native to: AB, BC, SK, YT, NT
Other Names: river alder, speckled alder, thin-leaved alder, thinleaf alder, western river alder
Other Names: black karagana, caragana, pea tree, siberian pea shrub, yellow acacia