About US Grow Zones

US Grow Zones helps U.S. home gardeners answer two questions: what will survive my winter? and when should I plant? Every page is built from public scientific data, and every frost date names the weather station it came from.

What you'll find

• A ZIP code lookup for the 2023 USDA plant hardiness zones.
• Frost dates and planting calendars for 512 cities in all 50 states and DC.
• Guides to all 26 half-zones and 20 common crops.

Independence

This is an independent project. It is not affiliated with or endorsed by the USDA, Oregon State University, NOAA, or any Cooperative Extension service. The official USDA map is at planthardiness.ars.usda.gov.

Advertising

The site is free and supported by advertising. Ads never change the data.

Questions or corrections: contact us.