Hardiness Zone Finder
Find your USDA Plant Hardiness Zone to choose the right plants for your climate.
Hardiness Zone Finder
Find your USDA Plant Hardiness Zone to choose the right plants for your climate
About Hardiness Zones
The USDA Plant Hardiness Zone Map divides North America into 13 zones based on average annual minimum winter temperature. Each zone is 10°F warmer (or colder) than the adjacent zone.
Formula
Based on average annual minimum winter temperatureHow to Use
- 1Choose lookup method — Select ZIP code or temperature-based lookup.
- 2Enter your information — Input your ZIP code or average minimum winter temperature.
- 3Find your zone — Click the button to determine your hardiness zone.
- 4View recommendations — See planting tips and suitable plants for your zone.
Frequently Asked Questions
What is a hardiness zone?
USDA Plant Hardiness Zones divide North America into 13 zones based on average annual minimum winter temperature. Each zone is 10°F warmer or colder than adjacent zones.
Why does my zone matter?
Your zone determines which perennial plants can survive winter in your area. Annuals are less affected since they complete their life cycle in one season.
Can I grow plants from other zones?
You can grow plants rated for colder zones (lower numbers). Plants from warmer zones may need winter protection or be grown as annuals.
Are there microclimates in my yard?
Yes! South-facing walls, low spots, and areas near buildings can be warmer or colder than your general zone. Observe your specific conditions.
How accurate is ZIP code lookup?
ZIP codes cover large areas with varying conditions. For precise information, use the official USDA Plant Hardiness Zone Map at planthardiness.ars.usda.gov.