Hardiness Zone by Putting in Zipcode

[Mona Miller]

http://www.garden.org/zipzone/index.php
"The USDA Hardiness Zone Map divides North America into 11 separate zones; each zone is 10°F warmer (or colder) in an average winter than the adjacent zone. If you see a hardiness zone in a catalog or plant description, chances are it refers to the USDA map. To find your USDA Hardiness Zone, enter your zip code or use the map below (see above website)."