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:
Then choose the link "USDA Plant Hardiness Zone Map". You will find information for the United States, Canada, and Mexico.
Data from 1998 US National Arboretum (Web Version) of the USDA Plant Hardiness Zone Map, USDA Miscellaneous Publication No. 1475, issued January 1990.