Us Hardiness Zone Map 2024 Us. According to the new map released in november 2023, about half of the united states has shifted to a new hardiness zone. The usda plant hardiness zones are related to the average lowest minimum temperature at a location.
For the first time in more than a decade, the united states department of agriculture (usda) released new hardiness zone maps. For decades, gardeners and growers have relied on the usdaโs plant hardiness zone map to decide what perennials, shrubs and trees are best to grow in.