Usda Cold Hardiness Zone

To find your usda hardiness zone, enter your zip code or use the map below. To find your usda hardiness zone, enter your zip code or use the map below. For example, the average lowest temperature in usda zone 7a is 0 to 5 degrees f, and 7b is 5 to 10 degrees fahrenheit.

The hardiness zone map system divides the united states and canada into numbered zones based on lowest average winter temperature. The usda plant hardiness zones are related to the average lowest minimum temperature at a location. Shop by your zone & garden with the confidence that your plants will thrive

In zone 1a, located in the coldest areas of alaska, the lowest average winter temperature is between minus 60 and minus 55 degrees f.

Plants that might otherwise be hardy in your zone might be injured if soil moisture is too low in late autumn and they enter dormancy while suffering moisture stress. Cold hardiness arizona california colorado nevada new mexico texas utah interactive map get all the cold hardiness information you need with the interactive map on the usda website. The usda hardiness zone map divides north america into 11 separate planting zones; Usda usda zones 7a through 9a are represented in alabama.