Growing Zone Finder
Find your USDA Plant Hardiness Zone based on your average annual minimum winter temperature.
How It Works
Enter your average annual minimum winter temperature. The calculator matches it to the USDA Plant Hardiness Zone map, which determines which perennial plants survive in your area.
Formula
USDA Zone based on average annual minimum temperature (°F)
Frequently Asked Questions
What is a USDA hardiness zone?
USDA Plant Hardiness Zones divide the US into 13 zones based on average annual minimum winter temperatures. Zone 1 is the coldest (-60°F) and Zone 13 is the warmest (above 60°F).
How do I use my hardiness zone?
Check plant tags for the hardiness zone rating. A plant listed as "hardy to Zone 6" can survive winters in Zone 6 and warmer zones. It may not survive in colder zones.