What Hardiness Zone Am I In 2024. Each growing zone is 10°f warmer (or colder) in an average winter than the adjacent. The plant hardiness zone map — a resource that gardeners and growers across the country use to determine which perennial plants can grow in their area — can.

The map categorizes zones based on the average annual extreme minimum winter temperature, ranging from the coldest zone one to the warmest zone 13, with 10. Department of agriculture has an updated plant hardiness zone map.