Expert Problem Solver

Too Close to Black Walnut Tree

Too Close to Black Walnut Tree
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Bonide Solutions:
 
Black Walnut trees produce a toxin called juglone. This toxin prevents many plants from growing under or within the root zone of Black Walnuts. The roots seem to contain the highest concentration of juglone, but all parts of the tree including leaves, stems and fruit contain some of the toxin. Makes the soil acidic.