Historically prized for its rich wood, the Black Walnut is a large tree, generally around 50-100 feet but may grow to be 150 feet. It has a 50 foot spread and a 36 inch diameter trunk. It grows at a medium rate of 13-24 inches per year. The Black Walnut is long-lived with a lifespan of around 200 years.
The Black Walnut tree has finely toothed, pinnately compound leaves that grow approximately 12-25 inches and are made up of 15-23 individual leaflets. These fragrant green leaves are smooth on the top and fuzzy underneath. Leaves transition from green to yellow in fall.
Male flowers appear as yellowish-green catkins two to four inches in length. The female flowers appear in clusters. These will ripen in autumn, creating green husks which enclose hard, dark brown nuts. The nuts are edible and sweet and are grown commercially and used in many popular food items.
Black Walnut trees do best in full sunlight and are intolerant of shade. They grow best in acidic, alkaline, loamy, sandy or clay soils that are well-drained. Hardiness Zone: 4-9