Kathleen Cue, Nebraska Extension Horticulture Educator in Dodge County
Urban dwellers either praise or curse the black walnut (Juglans nigra). Some find the tree troublesome because of the nuts they drop, the juglone (a natural herbicide) secreted into the soil to kill nearby plants, and the increased number of squirrels in the neighborhood. Supporters of black walnut like the tree because it is native, well adapted to the precipitation and temperature variations of Midwest weather, is stately, grows valuable wood and nuts, and provides food for wildlife.