Lowland and upland forests, also commonly appearing in fields from nuts planted by squirrels. Commonly planted even into the Upper Peninsula, and seeding readily from planted trees. Probably all records north of the middle of the Lower Peninsula are of individuals spread from planted tree, except perhap some on the west side of the State..

Now rather scarce as large trees, Black walnuts are valuable for fine lumber as well as nuts. Seedlings of Juglans nigra may have leaves with developed terminal leaflets.