Large long-lived deciduous tree producing the familiar table walnut. Slow to mature — fruiting trees take 5–10 years from planting.
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
- Allelopathic — releases juglone from roots and leaves that inhibits many other plants. Site at least 15 m from sensitive vegetables and fruit trees
- Late to leaf out — useful indicator of when spring frost risk has truly passed
Pet caution: Walnut — English / Persian 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 — English / Persian against your zones