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Hyacinth Plant

Q.Black Walnut

Zone 18062 | desbdmail added on June 8, 2018 | Answered

Can rhododendrons grow around black walnut trees?

A.Answers to this queston: Add Answer
Answered on June 9, 2018

Thank you for sending us your gardening question.

Black walnut trees have chemical properties in leaves and roots that can suppress the growth of other plants. This is called "allelopathy". Some plants are more susceptible to the allelopathic effect from black walnut than others, rhododendrons (including azaleas) are known to be affected.

This article has a section on allelopathic trees and discusses black walnut:


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