us zone map

USDA Hardiness Zone Finder

Interactive tool that returns the user's USDA Plant Hardiness Zone by state or by average winter low temperature, with grass type and seeding window guidance.

What's My Hardiness Zone?

USDA Plant Hardiness Zones are based on the average lowest winter temperature in your area. They tell you which grasses and plants will survive your winters.

Use the average coldest temperature in a typical winter — not a record low. If you don't know it, the National Weather Service climate page for your area lists it as "extreme minimum temperature."

State estimates are approximate — climate varies within every state. For an exact zone tied to your ZIP code, use the official USDA Plant Hardiness Zone Map. Zones reflect cold tolerance only; heat, humidity, and rainfall also affect what grows in your area.

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