The Black Walnut tree (Juglans nigra) is an allelopathic plant. This means that it can suppresses the growth of many different types of plant. The Black Walnut releases a chemical into the soil called juglone which causes the poor growth or outright death of many plants planted under and around the tree. The area affected can reach a 50-60 foot radius around the tree and so meti mes even 80 feet. Luckily for those of you who inherit a black walnut tree with a new ho me there are many types of plants that are not susceptible to the juglone chemical so gardening can still be a joy. Here is a list of plants that have been observed growing under and near Black Walnut trees. As for grass Kentucky Bluegrass grows well under Black Walnuts.

Plants Tolerant of Black Walnuts