Disclaimer

ZIP Frost Dates is an independent reference site. It is not affiliated with, endorsed by, or operated by NOAA, the USDA, Oregon State University or any other government agency.

• Frost dates are probabilities from 30 years of past weather, not forecasts. Any year can have a frost earlier or later than shown.
• Dates come from the closest NOAA station, which may be many miles away or at a different elevation. Conditions in your yard can differ.
• This is not the official USDA Plant Hardiness Zone Map. Zones are shown as published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables. The official map is at planthardiness.ars.usda.gov.
• Planting dates from the calculator are simple counts from the frost date you choose. Follow your seed packet and local advice.
• Ads, if shown, are labeled “Advertisement” and are not endorsements.

Spotted an error? Email [email protected].