GrowZone guide
USDA hardiness zones explained
Hardiness zones describe winter survival risk. They help with perennials, but annual vegetable timing still needs frost windows.
1. USDA zones are based on average annual extreme minimum temperature
USDA zones are based on average annual extreme minimum temperature.
2. A zone is not a full planting calendar
A zone is not a full planting calendar. Spring frost, fall frost, soil temperature, and crop speed still matter.
3. GrowZone shows zone next to frost dates so you can understand both long-term cold risk and this season's timing
GrowZone shows zone next to frost dates so you can understand both long-term cold risk and this season's timing.