USDA Hardiness Zone Finder
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, locate on your state/city on the image below.
This is the new hardiness zone map. Listed are the average minimum yearly low temperatures, not the the coldest temperatures ever recorded. A plant not fully dormant can be damaged at much warmer temperatures. Other factors, including chilling requirements and heat units, are critical to plant performance within a climate zone. These are the zones listed for each variety throughout the catalog!
What are Zone Maps?
Gardeners need a way to compare their garden climates with the
climate where a plant is known to grow well. That's why climate
zone maps were created. Zone maps are tools that show where various
permanent landscape plants can adapt. If you want a shrub,
perennial, or tree to survive and grow year after year, the plant
must tolerate year-round conditions in your area, such as the
lowest and highest temperatures and the amount and distribution of
rainfall.