Plants That Tolerate Black Walnut Juglone Toxicity

Gardening Under Black Walnut Trees

Black walnut trees release juglone, a chemical toxic to many plants, through roots, leaves, and nuts. While some plants (daylilies, phlox, iris) tolerate it, others fail. Zebra grass (Miscanthus sinensis 'Zebrinus') isn't well-documented for juglone tolerance.

Juglone-Tolerant Plant List

Refer to the University of Wisconsin Extension's comprehensive list of juglone-tolerant plants for reliable selections: Juglone Tolerant Plants.

Design Tips

• Focus on proven tolerant perennials and shrubs.
• Remove fallen walnut leaves and nuts promptly to reduce soil contamination.
• Consider raised beds with imported soil for sensitive plants.