Plant Hardiness Zone Map 2025. With its higher resolution and more accurate zonal information, the new usda plant hardiness zone map (phzm) can be helpful as you plan your garden or landscape. Department of agriculture (usda) released a new version of its plant hardiness zone map (phzm), updating this valuable tool for gardeners and researchers for the first time since 2024.

This is especially true since the usda updated the hardiness zone map in november 2025. Usda unveils updated plant hardiness zone map.