The table provided here is a guide to the zone designations listed in this catalog. To access more detailed information and specific geographic locations, go to the following internet site:
http://www.usna.usda.gov/Hardzone/ushzmap.html
Then choose the link "USDA Plant Hardiness Zone Map". You will find information for the United States, Canada, and Mexico.
Zone |
Temperature in Degrees F(C) |
1 |
below -50F (-45.6C) |
2 |
-40 to -50F (-40.0 to -45.5C) |
3 |
-30 to -40F (-34.5 to -39.9C) |
4 |
-20 to -30F (-28.9 to -34.4C) |
5 |
-10 to -20F (-23.4 to -28.8C) |
6 |
-0 to -10F (-17.8 to -23.3C) |
7 |
10 to 0F (-12.3 to -17.7C) |
Data from 1998 US National Arboretum (Web Version) of the USDA Plant Hardiness Zone Map, USDA Miscellaneous Publication No. 1475, issued January 1990. |