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Why do some plants die when they are planted under or near a Black Walnut tree?

April 26, 2017Black die near PLANTED plants tree walnut

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Why do some plants die when they are planted under or near a Black Walnut tree?

1 Answer

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The Black Walnut tree contains a chemical (the phytotoxin juglone) which causes damage and even death in many plants. As anyone who has tried to plant under or near a Black Walnut tree knows, there are only certain plants that will thrive when juglone is present in the soil.