seeds of exotic plants

Climate zones - hardiness

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.

USDA zone :
minimum temperature (Fahrenheit):
minimum temperature (Celsius):

USDA zones
minimum temperatures

USDA zone

° Celsius

° Fahrenheit

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

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

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