Plant Hardiness Zone Map 2025. The new map provides valuable. The usda recently released a new plant hardiness zone map, and although you may have used the interactive map in the past, it got its first full revamp in over a decade.
For decades, gardeners and growers have relied on the usda’s plant hardiness zone map to decide what perennials, shrubs and trees are best to grow in. Natural resources canada is working on the first update to its plant hardiness.