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I have heard that black walnut sawdust should not be used in composting. People have told me it is poisonous to other plants. Is that true. I have several bushels of sawdust and would hate to send it to the land fill, but don't want to poison my garden either.
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Here is a good publication on black walnuts and how they affect surrounding horticultural plants. If you have more questions, please feel free to contact me.
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