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HARDINESS ZONES


The climatic zones were developed of the US Department of Agriculture and comprehend the average annual minimum temperatures from one zone, whereby each zone divided into 5,5ºC resp. 10 Fahrenheit. The temperature ranges to refer to their natural environment resp. range.

Hardiness Zones
Annual Minimum Temperatures

Zone

Celsius: °C

Fahrenheit: F

1a

unter -45,5

unter -50

2a
2b

-45,5 to -42,8
-42,7 to -40,1

-50 to -45
-45 to -40

3a
3b

-40,0 to -37,2
-37,1 to -34,5

- 40 to -35
-35 to -30

4a
4b

-34,5 to -31,6
-31,5 to -28,9

-30 to -25
-25 to -20

5a
5b

-28,8 to -26,1
-26,0 to -23,4

-20 to -15
-15 to -10

6a
6b

-23,3 to -20,5
-20,4 to -17,8

-10 to -5
-5 to 0

7a
7b

-17,7 to -15,0
-14,9 to -12,3

0 to 5
5 to 10

8a
8b

-12,3 to -9,4
 -9,3  to -6,7

10 to 15
15 to 20

9a
9b

 -6,6 to -3,9
 -3,9 to -1,2

20 to 25
25 to 30

10a
10b

-1,1  to 1,7
1,8 to  4,4

30 to 35
35 to 40

11a
11b

4,4  to  7,2
7,1  to 10,0

40 to 45
45 to 50

12

10,1 to +15,6

50 to 60

 

 

 

 

 

  

 

 

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