Black Walnut composting - Knowledgebase Question

Cleveland, OH (Zone 5B)
Question by SBWhiting
April 16, 2007
Can I safely add Black Walnut twigs to my compost pile? Something in the roots is a herbicide, are the branches going to spoil my compost?

Answer from NGA
April 16, 2007


To be on the safe side, don't compost walnut tree leaves or twigs in great volume. A few won't ruin your compost pile, but composting large amounts could spread the juglone (growth inhibiting chemical) to the rest of your yard.

Best wishes with your landscape!

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