Large evergreen citrus tree producing pink, red, or white-fleshed fruit. Of all citrus, the most demanding of summer heat to develop sweetness.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 9–12 | −6.7 °C to 15.6 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H3 | −5 °C to 1 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 9 | −1 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 5–7 | 5 °C and warmer | Plant tolerates down to this zone |
Growing notes
- Fruit only sweetens fully in genuine subtropical heat — disappointing in marginal climates
- Long ripening period (8–14 months) means a tree may carry fruit and flowers simultaneously
Pet caution: Grapefruit 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 Grapefruit against your zones