The 'Thomas Black' Black Walnut tree, Juglans nigra, 'Thomas Black', is one of the most popular nut trees in America, not only because of its expensive wood, but the nuts are in high demand for cookies, cakes and ice-cream. The Thomas strain is the best seedgrown clone of all. It produces many bushels of nuts large in size and easily cracked. The straw colored kernels are tangy flavored and delicious. This deciduous majestic shade tree is one of the trouble free trees to grow. Black Walnust trees reach up to 50 ft. tall, and one mature tree often sells for several thousand dollars. Many people plant these trees not only for the abundant crop of nuts, but as a timber investment for their children?s future. The nuts are rounder in shape than common walnut.