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Last Frost usually January 31 or before First
Frost usually November 30-December 31 |
Columns show Low Temperature Ranges
| USDA | Fahrenheit | Celsius | USDA | Fahrenheit | Celsius |
Sunset Magazine Zone 2B includes
parts of central Nevada, central and southern Utah, isolated areas of
Colorado, along with eastern Washington and Oregon and the isolated island
mountains of the southwest. The minimum temperatures range between 12 ° and 22 ° F,
with extreme lows ranging from – 10 ° to –20 ° F.
The growing season varies from 115 days to 160 days.
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| 1 | Below -50 | Below -45.6 | 6b | -5 0 | -17.8 -20.5 | |
| 2a | -50 -45 | -42.8 -45.5 | 7a | 0 5 | -15.0 -17.7 | |
| 2b | -45 -40 | -40.0 -42.7 | 7b | 5 10 | -12.3 -14.9 | |
| 3a | -40 -35 | -37.3 -39.9 | 8a | 10 15 | -9.5 -12.2 | |
| 3b | -35 -30 | -34.5 -37.2 | 8b | 15 20 | -6.7 -9.4 | |
| 4a | -30 -25 | -31.7 -34.4 | 9a | 20 25 | -3.9 -6.6 | |
| 4b | -25 -20 | -28.9 -31.6 | 9b | 25 30 | -1.2 -3.8 | |
| 5a | -20 -15 | -26.2 -28.8 | 10a | 30 35 | 1.6 -1.1 | |
| 5b | -15 -10 | -23.4 -26.1 | 10b | 35 40 | 4.4 1.7 | |
| 6a | -10 -5 | -20.6 -23.3 | 11 | above 40 | above 4.5 |
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Return Home Mountain States Wholesale Nursery webmaster george@mswn.com January 05, 2009 |