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°Ï°ì(Zone)¦~¥§¡³Ì§C·Å |
|
Zone
1 |
Below -50*F |
|
Zone
2
|
-50* to -40* |
|
Zone 3 |
-40* to -30* |
|
Zone 4 |
-30* to -20* |
|
Zone 5 |
-20* to -10* |
|
Zone 6 |
-10* to 0* |
|
Zone 7 |
0*
to 10* |
|
Zone 8 |
10* to 20* |
|
Zone 9 |
20* to 30* |
|
Zone 10 |
30* to 40* |
¸ê®Æ¨Ó·½:
Zone Ratings: Average Annual Minimum Temperature Range.
U.S. Dept. of Agriculture
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