Red Alder vs Dwarf-Bog Birch - TreeTime.ca

Red Alder vs Dwarf-Bog Birch

Alnus rubra

Betula glandulosa

CUSTOM GROW

CUSTOM GROW

Red Alder
Dwarf-Bog Birch

Red Alder is a fast-growing deciduous tree native to western North America. Its fixes nitrogen, which enriches soils and supports the growth of surrounding plants. Ideal for sites with poor soil conditions, or areas disturbed by logging, construction or fire.
It provides shade in riparian areas, creating cover for fish. Its seeds and buds are eaten by birds and small mammals, while the foliage provides browse for wildlife. The catkins release clouds of pollen attracting bees and other insects.
The Red Alder gets its namesake from the rusty-red color the bark turns when bruised.

Dwarf-Bog Birch is a native, cold-hardy shrub that can be found across most of Canada. Its preference for moist soils and the extensive root system make it well-suited for riparian zone plantings, soil stabilization, and erosion control projects.
It features small, round, leathery leaves with scalloped edges and produces small, cone-like catkins. A distinguishing characteristic of the Dwarf-Bog Birch is the presence of large resin glands on the branches and the undersides of the leaves. These resin glands are the reason for its scientific name, Betula glandulosa.
Note: We use Dwarf-Bog Birch for Betula glandulosa. This species is also known by many other common names, including Bog Birch, Dwarf Birch, Glandular Birch, and others. Please confirm the scientific name to ensure you are ordering the correct plant.

Red Alder Quick Facts

Dwarf-Bog Birch Quick Facts

Zone: 5b
Zone: 2a
Height: 15 m (50 ft)
Height: 1.8 m (6 ft)
Spread: 9 m (30 ft)
Spread: 1.2 m (4 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: normal, wet
Growth rate: fast
Growth rate: medium
Life span: medium
Life span: medium
Growth form: upright, rounded to conical
Growth form: spreading to prostrate, clump-forming
Spreading: seeds - medium, stump sprouting - medium
Spreading: seeds - medium, layering - medium


Bark: smooth, grey
Bark: reddish brown
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: yes


Native to: BC
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU
Other Names: oregon alder, pacific coast alder, western alder
Other Names: dwarf birch, dwarf resin birch, glandular birch, resin birch, scrub birch, swamp birch