The Black Walnut tree, Juglans nigra, is valued for its wood and shade. Black Walnut trees are a big, moderately growing, majestic tree. This deciduous tree makes a magnificent shade tree, and when planted for a wood plantation, makes a huge long-term asset. This tree has reasonable water requirements and is broadminded to drought. It has enormous, upright spreading, open branches.The nuts are big and plump and break out of the shell easily. The roots of the black walnut create a substance known as juglone (5-hydroxy-alpha-napthaquinone). This biochemical is toxic to a lot of plants such as the tomato, potato, black and blue berries, and other plants that may grow inside a 50 to 60 foot radius of the stem. Not all plants are responsive to juglone and many trees, vines, shrubs, and flowers will thrive in close nearness to a Black Walnut tree.








