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Black Walnut Trees

Q.Will Burning Black Walnut Brush Kill The Juglone? Can I Use The Ash In My Compost?

Zone Kingston Ontario | Kirbymbt added on May 10, 2020 | Answered

I’d like to know is Juglone survives burning and if I can use black walnut ashes in my compost.

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Certified GKH Gardening Expert
Answered on May 13, 2020

There isn't much information on the subject. Juglone appears to have an incredibly high thermo-tolerance. I don't think it would survive burning, but any ash not thoroughly incinerated could harbor some of the herbicide.

I don't recommend it, but if you do then make sure it is thoroughly burned.

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