Zone 4-9 ☼
Black walnut reaches a mature size of 50 to 90 feet in height and 2 to 3 feet in diameter. The heartwood is heavy, hard and strong, with a rich chocolate-brown color of superior quality and value. It is prized for veneer, fine furniture, paneling, cabinetwork and gun stocks. The nut shells are ground into an abrasive cleaning agent for jet engines, filler for dynamite, a filter agent in smokestacks and a flour-like carrying agent for insecticides. Squirrels, birds and people eat the sweet, oily nuts. Its habitat includes deep, well-drained soils, and it grows best on the lower north- or east-facing slopes.