Collection: Black Walnut tolerant

While many plants can grow well in proximity to a black walnut tree, some plants suffer from being planted near the black walnut.  Signs of black walnut toxicity can include wilting, yellowing leaves, and stunted growth. 

This is because the black walnut tree produces a chemical called juglone. Juglone occurs in all parts of the tree, especially in the buds, nut hulls, and roots. The leaves and stems also contain smaller quantities of juglone which is leached into the soil after they fall and start to break down.

While the highest concentration of juglone occurs in the soil directly under the tree’s canopy, highly sensitive plants may show signs of suffering even out beyond the canopy drip line. Because decaying roots can release juglone, toxicity may occur for several years after a tree has been removed.  

Most toxicity symptoms arise when juglone-sensitive plants are placed within the walnut’s root zone, an average of 50 to 60 feet from the trunk of a large tree.

Juglone doesn't affect all plants so here's a list of plants we have available that you can plant within the black walnut zone and they'll do just fine.