Bog Birch vs Sitka Alder - TreeTime.ca

Bog Birch vs Sitka Alder

Betula pumila

Alnus alnobetula subsp. sinuata

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Bog Birch
Sitka Alder

Bog Birch is a hardy, deciduous shrub native to North America. It thrives in wetlands, riparian zones, and boreal forests, and can be found as far north as the Arctic Circle—making it one of the few woody plants to grow in such extreme climates.

In Western Canada, it is especially common in moist lowlands, along streambanks, and in peatlands. Beyond its ecological role in stabilizing soils and supporting wildlife, Bog Birch is frequently used in reclamation and restoration projects due to its resilience and ability to establish quickly in disturbed or degraded landscapes.

Note: We use Bog Birch for Betula pumila. This species is also known by many other common names, including Dwarf Birch, Swamp Birch, and others. Please confirm the scientific name to ensure you are ordering the correct plant.

Sitka Alder is a native deciduous shrub or small tree that often forms dense thickets. Its extensive root system stabilizes slopes and streambanks. Nitrogen-fixing capabilities and nutrient-rich leaf litter improve soil fertility, creating better growing conditions for surrounding plants. These qualities make it especially effective in disturbed or erosion-prone sites.

Often found in moist, high-elevation mountain environments, Sitka Alder also enhances habitat by providing cover and structure in both riparian and upland areas. Birds and small mammals utilize it for nesting, and its seeds serve as a food source.

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

Bog Birch Quick Facts

Sitka Alder Quick Facts

Zone: 2a
Zone: 2a
Height: 2.4 m (8 ft)
Height: 5 m (15 ft)
Spread: 1.2 m (4 ft)
Spread: 3 m (10 ft)
Light: full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: wet
Growth rate: very fast
Growth rate: medium
Life span: short
Life span: medium
Growth form: upright to prostrate, thicket-forming
Spreading: seed - medium, layering - medium
Suckering: none


Fall colour: red-orange
Bark: redish-brown to grey, smooth
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Native to: AB, BC, YT, NT
Other Names: dwarf birch, low birch, scrub birch, swamp birch
Other Names: wavy leaf alder