USDA Growing Zone Map
Find your hardiness zone, understand your local winter temperatures, and choose perennial plants and bulbs suited to your part of the country.
Start with your ZIP code.
Your zone helps you understand which perennial plants can reliably survive winter where you garden.
Enter a five-digit U.S. ZIP code.
What Is a Hardiness Zone?
Hardiness zones are a useful starting point for selecting plants that can handle winter in your area.
A measure of winter cold
The USDA Plant Hardiness Zone Map divides the country into zones based on the average annual extreme minimum winter temperature.
Each full zone spans 10°F and is divided into 5°F “a” and “b” half zones. Lower zone numbers indicate colder winter conditions; higher numbers indicate warmer conditions.
Zone Temperature Guide
These full-zone ranges offer a quick reference. The official USDA map also divides each zone into 5°F half zones.
How to Use Your Result
Your zone is most helpful when used alongside the growing information on each product page.
Find Your Zone
Enter your ZIP code and note both the zone number and its “a” or “b” half-zone designation.
Check Product Details
Compare your result with the recommended hardiness range listed for perennial plants and bulbs.
Plan for Your Garden
Consider local frost dates, sunlight, soil, rainfall, and microclimates before planting.
Choose plants for your garden.
Use your zone as a starting point, then explore Urban Farmer seeds, bulbs, and plants with the growing details you need to plan confidently.
Map source: USDA Plant Hardiness Zone Map, 2023, Agricultural Research Service, U.S. Department of Agriculture.