UK hardiness zones from 7 (bright green) to 10 (orange)
A hardiness zone (a subcategory of Vertical Zonation) is a geographically defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone.
For example, a plant that is described as "hardy to zone 10" means that the plant can withstand a minimum temperature of -1°C. A more resilient plant that is "hardy to zone 9" can tolerate a minimum temperature of -7°C.
Hardiness zones table[]
| Hardiness zone | Lowest temperature |
|---|---|
| 0 | < −51.1°C (−60°F) |
| 1 | −51.1°C (−60°F) |
| 2 | −45.6°C (−50°F) |
| 3 | −40°C (−40°F) |
| 4 | −34.4°C (−30°F) |
| 5 | −28.9°C (−20°F) |
| 6 | −23.3°C (−10°F) |
| 7 | −17.8°C (0°F) |
| 8 | −12.2°C (10°F) |
| 9 | −6.7°C (20°F) |
| 10 | −1.1°C (30°F) |
| 11 | +4.4°C (40°F) |
| 12 | > +10°C (50°F) |
WikiGardener[]
WikiGardener uses the hardiness zone scale to indicate where a plant grows best outdoors. It is entirely possible to grow plants outside of the advised zones. With the correct equipment a plant could be grown in controlled conditions in any environment.
Hardiness zone maps[]
References[]
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