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Green Alder vs Black LocustAlnus crispa Robinia pseudoacacia SOLD OUT SOLD OUT (new stock expected: fall of 2019) 
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.
Black Locust is an attractive tree. Its distinctive leaves are made of about a dozen bright green leaflets. It also notable for its fragrant white flowers, which smell of citrus. GREEN ALDER QUICK FACTSBLACK LOCUST QUICK FACTS
Zone:
1a
Zone:
3a
Height:
7 m (23 ft)
Height:
12 m (40 ft)
Spread:
3 m (10 ft)
Spread:
8 m (25 ft)
Moisture:
any
Moisture:
dry, normal
Light:
any
Light:
full sun
Fuzz/fluff:
yes
Catkins:
yes
Flowers:
Creamy white flowers in a pyramidal shape bloom in may-june
Bark:
dark reddish brown to balck with furrows
Growth rate:
fast
Growth rate:
fast
Life span:
50 years
Life span:
long
Maintenance:
low
Maintenance:
low
Suckering:
high
Suckering:
high
Pollution tolerance:
medium
Pollution tolerance:
high
In row spacing: 0.9 m (3 ft)
Between row spacing:
5 m (16 ft)
Other Names:
mountain alder, sitka alder
Other Names:
false acacia, yellow locust
Ships To Canada:
yes
Ships to USA: no
Ships To Canada:
yes
Ships to USA: yes |