Pygmy Caragana vs Mountain Alder - TreeTime.ca

Pygmy Caragana vs Mountain Alder

Caragana pygmaea

Alnus incana subsp. tenuifolia

CUSTOM GROW

CUSTOM GROW

Pygmy Caragana
Mountain Alder

Pygmy Caragana is a shrub that is related to Common Caragana and has a compact size that is suitable for yards with limited space. Its size is perfect for landscaping and decorative hedges, and requires little maintenance. This nitrogen fixer has fine-textured foliage and small yellow flowers. Much like Common Caragana, it is hardy and drought tolerant.

Popular as a low maintenance commercial landscaping shrub and for hedging. This species does have tiny spines that might poke you a bit. It has a nice appealing texture when mature.

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.

Pygmy Caragana Quick Facts

Mountain Alder Quick Facts

Zone: 2b
Zone: 1a
Height: 1.2 m (4 ft)
Height: 6 m (20 ft)
Spread: 1.2 m (4 ft)
Spread: 3 m (10 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
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


Bark: smooth, gray to brown
Flowers: prolific tiny yellow pea-like flowers
Seeds: prolific seedpods are edible
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: AB, BC, SK, YT, NT
Other Names: pygmy peashrub
Other Names: river alder, speckled alder, thin-leaved alder, thinleaf alder, western river alder