Walnut, Black

Black Walnut (Juglans nigra)

Black Walnut is a grand, long-lived native tree known for its high-quality wood, valuable edible nuts, and ornamental appeal. With a tall, straight trunk, lush green foliage, and a wide, rounded canopy, Black Walnut brings shade, structure, and productivity to large landscapes and orchards. Its nuts are highly nutritious and sought after by both humans and wildlife. Black Walnut is well-suited for food forests, agroforestry, and timber projects, though it requires careful planning due to its allelopathic properties, which can inhibit the growth of some nearby plants.

Key Characteristics

Nutritious and Edible Nuts: Black Walnut produces rich, flavorful nuts with a high nutritional content, including healthy fats and protein. The nuts mature in fall and are popular in baking and cooking, though the hard shells require some effort to crack.

High-Value Timber: The wood of Black Walnut is prized for its strength, fine grain, and rich, dark color, making it one of the most valuable hardwoods for furniture, cabinetry, and specialty woodworking. Its economic value makes it a preferred choice in timber and reforestation projects.

Wildlife Habitat and Food Source: Black Walnut's nuts are a valuable food source for squirrels, deer, and birds. The tree's large, spreading canopy provides shelter and nesting opportunities for various wildlife, enhancing biodiversity in the landscape.

Allelopathic Properties: Black Walnut releases a compound called juglone, which can inhibit the growth of sensitive plants nearby, such as tomatoes and certain other garden crops. It is best planted in areas away from sensitive plants or integrated into food forests with juglone-tolerant species.

Adaptable and Hardy: Black Walnut thrives in well-drained, loamy soils and tolerates a variety of conditions, including moderate drought. It prefers full sun and is ideal for large, open areas, where it can reach its full height and spread over time.

Product Details

• Native Range: Eastern United States
• Plant Life Cycle: Deciduous tree
• Sun Requirements: Full sun
• Soil Requirements: Prefers well-drained, loamy soils; tolerates clay and sandy soils
• Mature Height: 50-75 feet
• Bloom Time: Late spring (inconspicuous flowers)
• Nut Ripening Season: Fall
• Fall Color: Yellow
• USDA Hardiness Zones: 4-9

Black Walnut's valuable nuts, timber, and wildlife support make it a highly functional tree for food forests, timber production, and large landscapes, where it can thrive for generations.