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Horse Chestnut vs Green AlderAesculus hippocastanum Alnus crispa ONLY AVAILABLE BY CONTRACT GROW SOLD OUT 
Horse Chestnut is a medium sized deciduous tree that is native to Greece but has been grown in North America for hundreds of years. It produces large nuts. A top CO2 absorbing species. Experts think this tree may help climate change more than others.
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. HORSE CHESTNUT QUICK FACTSGREEN ALDER QUICK FACTS
Fuzz/fluff:
yes
Catkins:
yes
Fall colour:
yellow to orange
Nuts:
large nuts within spiky capsules. Slightly poisonous to eat
Growth rate:
medium
Growth rate:
fast
Maintenance:
medium
Maintenance:
low
Pollution tolerance:
high
Pollution tolerance:
medium
In row spacing: 0.9 m (3 ft)
Between row spacing:
5 m (16 ft)
Toxicity: raw Horse Chestnut seed, leaf, bark and flower is toxic if ingested due to the presence of esculin.
Other Names:
mountain alder, sitka alder
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