Planting Under Walnut Trees - Knowledgebase Question

Tigard, OR
Question by perrines4
June 7, 1998
What annuals, perennials, or ground covers will grow under walnut trees?


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Answer from NGA
June 7, 1998

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The plants most tolerant of the growth inhibiting juglone given off by walnut trees include: arborvitae, ctalpa, clematis, daphne, euonymous, junipers, rose of Sharon, biburnum, astilbe, bee balm, begonia, bellflower, Shasta daisy, daylily, chrysanthemum, coral bells, wild ginger, orange hawkweed, hollyhock, hosta, morning glory, pansy, phlox, marigold, primrose, stonecrop, tulip, violet, and zinnia.

Most vegetables of the nightshade family are extremely sensitive to juglone, as are narcissus, peony, petunia, columbine and lilac and should not be planted near walnut trees.

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