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River Alder vs Green AlderAlnus incana Alnus crispa NOT AVAILABLE THIS SEASON SOLD OUT (new stock expected: later this season) 
River Alder is a large shrub or small tree with a multi-stemmed, spreading habit. It is an excellent tree to plant if you want to stabilize the soil near rivers and creeks.
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 quality. RIVER ALDER QUICK FACTSGREEN ALDER QUICK FACTS
Zone:
1a
Zone:
1a
Height:
8 m (25 ft)
Height:
7 m (23 ft)
Spread:
4 m (12 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 to orange
Growth rate:
fast
Growth rate:
fast
Life span:
short
Life span:
50 years
Maintenance:
low
Suckering:
none
Suckering:
high
Pollution tolerance:
medium
Pollution tolerance:
medium
In row spacing: 0.9 m (3 ft)
Between row spacing:
5 m (16 ft)
Other Names:
mountain alder, sitka alder
Ships To Canada:
yes
Ships to USA: no
Ships To Canada:
yes
Ships to USA: no |