However, the toxic zone around a mature black walnut can extend 50 to 60 feet from the trunk, given that tree roots often grow farther than the branches. Even after removing a black walnut tree ...

However, black walnut trees can have some negative effects ... Juglone is found in the tree’s trunk, leaves, bark, twigs, fruit husks, and roots, which may extend 50 feet or more.

But it was healthy and a beautiful specimen of black walnut. After a week of ... from their lofty perch at the top of the tree. Being rather astute, it took me two years and several dents to the roof, ...