North American native walnut with intensely flavoured nut and exceptionally valued cabinet timber. Larger and more allelopathic than English walnut.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 4–9 | −34.4 °C to −1.1 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 4–9 | −29 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 1–5 | −15 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Strongest juglone producer among walnuts — exclusion zone for sensitive plants extends to 25 m
- Hard-shelled nut difficult to crack — most home growers value it for timber and shade rather than for eating
Pet caution: Walnut — Black is listed as potentially harmful to cats and/or dogs. Keep pets from grazing on it, and contact a vet if you suspect your animal has eaten some.
Categories
Related plants
Cross-check Walnut — Black against your zones