Walnut trees

Asked February 22, 2018, 8:12 PM EST

What vegetables would not be affected by nearby walnut trees?

Anoka County Minnesota

1 Response

Many plants are adversely affected by being grown near black walnut trees. The causal agent is a chemical called "juglone" (5 hydroxy-1, 4-napthoquinone), which occurs naturally in all parts of the black walnut. Vegetable plants sensitive to Juglone: cabbage, eggplant, pepper, potato, tomato Vegetable plants tolerant of Juglone: lima beans; snap beans; beets; corn; onions; parsnips http://www.wvu.edu/~agexten/hortcult/fruits/blkwalnt.htm http://www.ces.purdue.edu/extmedia/HO/HO-193.pdf