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Nitrogen fixing trees for zone7

 
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looking for nitrogen fixing trees for zone 7....any recommendations??
 
pollinator
Posts: 2952
Location: Massachusetts, Zone:6/7, AHS:4, Rainfall:48in even Soil:SandyLoam pH6 Flat
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These are all in the Elaeagnaceae family :
Silverberry
Goumi
Autum Olive
Seaberry
buffaloberry

They also have edible berries.
 
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Location: Northeast Arkansas
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Mimosa (Japanese Silk) Trees grow extremely fast where I am(Zone 7-8 ). And once they are a certain size they can handle some pretty extreme pruning. I have used the ones that popped up along my fence row (I don't weed eat) to make trellises, plant stakes, blanket ladders, and the like. As a bonus it has pretty flowers.

I have read there are medicinal qualities, but cannot personally attest to them.
 
steward
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Location: Montana
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fungi books food preservation bee
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I found this site that might be helpful. It has mostly smaller trees and shrubs for your zone but it still would probably be helpful.

Nitrogen Fixing Trees and Shrubs
 
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Black Locust, Honey Locust, Kentucky Coffee tree, Alder. Black Locust is my first choice because it is such excellent firewood. Honey Locust however produces edible pods.
 
Cassie Langstraat
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Black locust for the win!
 
gardener
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Ceanothus (California Lilac) is native. Alder might be too. Redbud has edible pods and early leaves, and shockingly beautiful purple leaves all over in the Spring.
John S
PDX OR
 
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