Hardiness Zone Finder

Enter the lowest temperature of an average winter where you live. The tool converts it into a USDA plant hardiness zone and lists plants that are hardy there.

Unit

Your hardiness zone

Zone 6a

Average lowest winter temperature: −10 to −5°F (−23 to −21°C).

How to use your zone

Plant labels and the profiles on this site give a hardiness range such as "zones 5 to 8". If your zone falls inside the range, the plant should survive your winters outdoors. If your zone is lower than the range, grow the plant in a pot and move it under cover for winter, or treat it as an annual.

In the United States you can also look up your zone by ZIP code on the official USDA Plant Hardiness Zone Map. For more detail on what zones mean and where they fall short, read hardiness zones explained.

USDA hardiness zone chart

ZoneLowest winter temperature (°F)Lowest winter temperature (°C)
1−60 to −50−51 to −46
2−50 to −40−46 to −40
3−40 to −30−40 to −34
4−30 to −20−34 to −29
5−20 to −10−29 to −23
6−10 to 0−23 to −18
70 to 10−18 to −12
810 to 20−12 to −7
920 to 30−7 to −1
1030 to 40−1 to 4
1140 to 504 to 10
1250 to 6010 to 16
1360 to 7016 to 21

Each zone is divided into an a half and a b half of 5°F. The a half is the colder one.