Black walnut and butternut tree leaves will have an alternate leaf arrangement. These trees will have a terminal leaflet with nine to 21 broadly lance-shaped leaflets.

The husked black walnut. ThoughtCo / Steve Nix. Walnut juice leaves a dark stain on hands, so if you are concerned about this, wear gloves or use tongs when handling newly unhusked and husked walnuts.

Tree-of-heaven’s leaf, comprised of many leaflets, can be up to 2½ feet long, while black walnut’s leaf may reach a maximum of 2 feet. Tree-of-heaven leaflets have what we call “glandular teeth” (See ...

Black walnut leaves, though, are among the types of leaves that should be avoided. Black walnut trees contain the compound juglone, that is produced in the branches, leaves, fruit and root system.

Look for maple, oak, and beech leaves, as they make excellent mulch. Avoid black walnut leaves since they can harm plants, and remove any sticks or debris as you go. 2.

At first glance, the compound leaves (See Figure 1) look somewhat like black walnut, but they typically have more leaflets (11-41) than black walnut (15-23). Tree-of-heaven’s leaf, comprised of many ...