Juglans nigra

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Black Walnut


Plant Specifics

Size:100-120 ft
Life Span:Long-lived perennial
Flower Color:NA
Fruit Color:Brown
Phenology:Deciduous. Blooms (inconspicuous) in spring. Nuts ripe in fall. Yellow fall color.
Noted for:Interesting foliage


Recommended Uses:Specimen tree. Woodlot tree.

Nuts can be abundant on the ground in fall.

Husks can stain.

Tree roots, nuts, and leaves exude an effective herbicide (juglone) to reduce competition. Use with care in the landscape, it can poison birches and many herbaceous plants.

Propagation:Easily grown from seed.
Availability:Native nurseries, Seed
Light: Full Sun,  Part Shade
Moisture Tolerance:
always floodedextremely dry
 (Somewhat moist, no flooding ----- to ----- Somewhat long very dry periods)
Moisture Tolerance: Somewhat moist, no flooding ----- to ----- Somewhat long very dry periods
Salt Water Flooding Tolerance:Not salt tolerant of inundation by salty or brackish water.
Salt Spray/ Salty Soil Tolerance:Moderate. Tolerant of salty wind and may get some salt spray. Exposure to salt spray would be uncommon (major storms).
Soil or other substrate:Clay, Loam, Sand
Soil pH:Acidic to circum-neutral



Seeds eaten by squirrels and other odents.  May be a significant food the fox squirrels (https://www.fs.fed.us/database/feis/plants/tree/jugnig/all.html)

Native Habitats:Dry mesic woods. Second bottoms. Prefers rich soils.

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
8A 8B 

USDA zones are based on minimum winter temperatures



Valuable for lumber which is often used for cabinetry.

People eat the nuts, but they are difficult to extract from their shells.

General Comments:
  • Will not produce flowers/seed unless it gets adequate winter cold, hence not recommended for use south of its native range.
  • Salt spray tolerance was based on comments about tolerance to winter road salt in the northeastern US.