Quick answer: Black walnut (Juglans nigra) is native to 33 states. What's commonly sold under this name is the true wild species. It's typically seed, verified 15 Sep 2026.
Where it's native
Listed in the register as native to these states. Click a state for its full native-plant guide.
Growing conditions
From the Lady Bird Johnson Wildflower Center Native Plant Database.
| Sun | Sun, Part Shade |
|---|---|
| Water | High water, Moist |
| Soil | Moist, rich soils - sandy loam, medium loam, clay loam, acid-based or calcareous |
| Bloom | Bloom Apr-May |
| Height | 50-75 ft, up to 150 ft |
| Wildlife value | Nuts attract squirrels and wildlife, larval host for luna and regal moths, attracts birds/butterflies |
No dedicated warning field; juglone in soil kills nearby tomatoes/apples. Husks rich in tannins/toxins, used as insecticide/fish poison/dye. Unanswered user question about toxicity to alpacas
Buying it
Sold true to the wild species as of the last check (15 Sep 2026), via Amazon.
Sold as: Seed via Amazon · listing verified 15 Sep 2026
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