When grown in the open, the black walnut reaches 75' tall with a round, low branching, open crown that spreads nearly as wide as it is tall. In forests and plantations, the tree may reach 150' tall with a well formed trunk and lower limbs self pruned from « to 2/3 the distance from the ground. It develops a deep taproot and is difficult to transplant. The hard to crack shell encases a rich flavored nut.
Average height: 75' tall
Characteristics: Yields a ripened nut crop in early to mid-autumn. The fruit consists of three layers: a green, fleshy husk; a black inner shell that is hard, thick and corrugated; and the kernel, which is oily and sweet. Begins to bear nuts in 12–15 years. Is prized in the woodworking world for its handsome grain. Moderate water.