Q.Black Walnut Mulch
Are black walnut shavings okay to use for mulch? Are there any harmful side effects for plants of any kind?

Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on March 23, 2011
All but a few plants can survive black walnut. Even when it is shredded for mulch, the wood will be allelopathic as it decomposes and kill many plants.
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