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River Birch vs Green Alder

Betula nigra

Alnus crispa

River Birch
Green Alder

River Birch has beautiful, peeling, brown bark that reveals camel-colored and pink beneath. It is more borer resistant than white bark birches, which makes it a much longer-lived landscape tree.

Green Alder is a cold hardy, native shrub. It is often planted on infertile sites so it can fix nitrogen from the air and improve the soil.

Green Alder is known for its smooth grey bark and attractive shiny green leaves; it is commonly used in reclamation.

RIVER BIRCH QUICK FACTS

GREEN ALDER QUICK FACTS

Zone: 1a
Zone: 1a
Height: 12 m (39 ft)
Height: 7 m (23 ft)
Spread: 5 m (16 ft)
Spread: 3 m (10 ft)
Moisture: normal, wet
Moisture: any
Light: full sun
Light: any
Fuzz/fluff: yes
Fuzz/fluff: yes
Catkins: yes
Catkins: yes
Fall colour: yellow
Fall colour: yellow
Bark: dark gray-brown or pinkish-brown and scaly
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: 50 years
Maintenance: low
Maintenance: low
Suckering: low
Suckering: high
Pollution tolerance: medium
Pollution tolerance: medium


In row spacing: 0.9 m (3 ft)
Between row spacing: 5 m (16 ft)





Ships To Canada: yes
Ships to USA: yes
Ships To Canada: yes
Ships to USA: no