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Black Walnut

Black walnut

Black walnut

Black walnut
Juglans nigra

Native to Delaware, walnut prefers deep, rich, moist soils. Walnuts are usually planted in open areas within an urban environment because they are allelopathic (produce toxins harmful to other plants). Walnuts develop best on deep, well-drained soils and black walnut trees are prized for their wood, which is used for veneer and furniture because it is durable and worked easily. Inside a yellow-green fibrous husk is the sweet and edible nut favored by many wildlife.

Black walnut has compound leaves that are up to 24 inches long with 15 to 23 sharply-oval, toothed, and long-pointed leaflets.


Location Points C.B.H. Height Crown
Holy Cross Church, Dover 332 218 90 95
416 Union St., Milton 301 186 95 81
1518 Gilpin Ave., Wilmington 266 158 87 82