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| The climate zones were developped by the US Department of Agriculture. The climate zones define the minimum temperatures during the year. Every climate zone includes an area of 10 °Fahrenheit (or 5,5 °Celsius).
You can search for plants which siut a specific hardiness, either through your input of a desired minimum temperature (in Fahrenheit or Celsius) or the USDA zone. |
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USDA zones |
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USDA zone |
° Celsius |
° Fahrenheit |
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1 |
below -45,5 |
below -50 |
|
2 |
-45,5 until -40,1 |
-50 until -40 |
|
3 |
-40,0 until -34,5 |
-40 until -30 |
|
4 |
-34,4 until -28,9 |
-30 until -20 |
|
5 |
-28,8 until -23,4 |
-20 until -10 |
|
6 |
-23,3 until -17,8 |
-10 until 0 |
|
7 |
-17,7 until -12,3 |
0 until 10 |
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8 |
-12,2 until -6,7 |
10 until 20 |
|
9 |
-6,6 until -1,2 |
20 until 30 |
|
10 |
-1,1 until 4,4 |
30 until 40 |
|
11 |
4,5 until 10,0 |
40 until 50 |
|
12 |
10,1 until 15,6 |
50 until 60 |