Us Hardiness Zones 2024. Each growing zone is 10°f warmer (or colder) in an average winter than the adjacent zone. Released in november 2023, the updated map was developed by oregon state university’s prism climate group and the usda’s agricultural research service.
Discover, analyze and download data from usda plant hardiness zone map. Each growing zone is 10°f warmer (or colder) in an average winter than the adjacent zone.