Black Walnut Tree - Juglans nigra

Black Walnut Tree is a native and deciduous tree.

Plant Details - Black Walnut Tree

Family: Juglandaceae

Light Requirement: Full Sun

Water Needs: Moist

Height: 50 – 75 ft.

Spread: 50 – 75 ft.

Growth Rate: Slow

Bloom Time: Spring

Flower Color: Yellow

Wildlife Value: Attracts birds

Landscape Uses and Maintenance - Black Walnut Tree

Black Walnut Tree is a slow growing deciduous tree that will reach great heights and create a large canopy, making a dramatic impact on your landscape.

Plant this tree to create a shade garden with plants tolerant of the Black Walnut. Alternatively, you can plant this tree as an accent in your landscape.  Avoid planting this tree along pathways.

This tree has yellow green catkins that emerge in the spring that are wind pollinated. This tree has thick ridged bark.

This tree will produce large nuts that are a favorite food of wildlife, including birds and squirrels. Nuts begin green and turn black as they mature, falling off the tree in early to mid fall. Caution, these nuts are heavy - mind your head!

Its green leaves will turn yellow in the fall. Prune damaged or diseased branches.

Plant this tree in an area that gets full sun and moist, well draining soil. This tree prefers loam or sandy soils. Avoid planting it in clay or compacted soil.

Water this tree thoroughly until well established. Make sure to water this tree during drought, as it prefers moist soil.

This tree is deer resistant.

Generally this tree is resistant to disease, but it should be watched for the Thousand Cankers disease.

Noteworthy Characteristics

You should be mindful of where you plant this tree - the Black Walnut Tree is known for producing a compound called juglone, which goes into the soil around the tree. However, do not be deterred from having a garden under this tree! There are plants that are tolerant of the compound, including ferns, bee balm, and astilbe.

Once mature, the seed husks are used for natural dyeing.

This tree is the host of the Luna Moth and many other butterflies.

This Is How Your Plants Will Look upon Delivery

Height at Maturity

Over 25 Feet

Care

Water Black Walnut trees deeply and infrequently to promote profound root growth. Mulch near the bottom to maintain moisture and regulate soil temperature. Prune during dormancy to remove dead or crossing branches and prevent disease.

Plant Reproduction

Black Walnut spreads via fallen nuts and root sprouts.

Plant bare root trees during the dormant season in early spring or late fall (November through April). Dig the hole twice as wide as the roots so the soil is well-drained. Position the tree so the root flare is at or just above ground level. Fill the hole back with the soil you dug from and water. Maintain soil moisture, especially in the tree's early years, by providing deep, regular watering. Apply a 2-4 inch mulch away from the trunk at the base to retain moisture and suppress weeds. Prune trees during the first few seasons to establish strength and resilience, remove damaged branches, and continue maintenance pruning as the tree matures. Regularly inspect for pests and diseases and apply integrated pest management practices. Protect young trees from mechanical damage and extreme temperatures with tree guards, and stake them if necessary for support, removing the stakes after one or two years.

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