PLANNING YOUR VEGETABLE GARDEN
Your garden should be 50 feet or more from black walnut or butternut trees. The roots of these trees produce a toxic chemical (juglone) that severely stunts or wilts several vegetable crops, especially potato and tomato. Injury due to juglone can even occur several years after walnut trees have been removed. The potential for injury is present as long as any part of the tree, dead or alive, is in the soil.
In addition, do not use walnut hulls when making garden compost or work them into the soil since they can also cause walnut wilt.
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