Plant Zone Map 2024. But recently, roughly a quarter of the country has moved zones. The plant hardiness zone map was updated for the 2024 gardening season with the addition of thousands more local weather stations.
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 any specific region. 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.