USDA Hardiness Zones
| Zone | From | To | |
| 0 | a | < −53.9 °C (−65 °F) | |
| b | −53.9 °C (−65 °F) | −51.1 °C (−60 °F) | |
| 1 | a | −51.1 °C (−60 °F) | −48.3 °C (−55 °F) |
| b | −48.3 °C (−55 °F) | −45.6 °C (−50 °F) | |
| 2 | a | −45.6 °C (−50 °F) | −42.8 °C (−45 °F) |
| b | −42.8 °C (−45 °F) | −40 °C (−40 °F) | |
| 3 | a | −40 °C (−40 °F) | −37.2 °C (−35 °F) |
| b | −37.2 °C (−35 °F) | −34.4 °C (−30 °F) | |
| 4 | a | −34.4 °C (−30 °F) | −31.7 °C (−25 °F) |
| b | −31.7 °C (−25 °F) | −28.9 °C (−20 °F) | |
| 5 | a | −28.9 °C (−20 °F) | −26.1 °C (−15 °F) |
| b | −26.1 °C (−15 °F) | −23.3 °C (−10 °F) | |
| 6 | a | −23.3 °C (−10 °F) | −20.6 °C (−5 °F) |
| b | −20.6 °C (−5 °F) | −17.8 °C (0 °F) | |
| 7 | a | −17.8 °C (0 °F) | −15 °C (5 °F) |
| b | −15 °C (5 °F) | −12.2 °C (10 °F) | |
| 8 | a | −12.2 °C (10 °F) | −9.4 °C (15 °F) |
| b | −9.4 °C (15 °F) | −6.7 °C (20 °F) | |
| 9 | a | −6.7 °C (20 °F) | −3.9 °C (25 °F) |
| b | −3.9 °C (25 °F) | −1.1 °C (30 °F) | |
| 10 | a | −1.1 °C (30 °F) | +1.7 °C (35 °F) |
| b | +1.7 °C (35 °F) | +4.4 °C (40 °F) | |
| 11 | a | +4.4 °C (40 °F) | +7.2 °C (45 °F) |
| b | +7.2 °C (45 °F) | +10 °C (50 °F) | |
| 12 | a | +10 °C (50 °F) | +12.8 °C (55 °F) |
| b | > +12.8 °C (55 °F) | ||
Read more about this topic: Hardiness Zone
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