Hardiness Zones 2024. Department of agriculture (usda) released a new version of its plant hardiness zone map. Department of agriculture (usda) today released a new version of its plant hardiness zone map (phzm), updating this valuable tool for gardeners and researchers for the first time since 2012.
Assessing potential climate change pressures across the conterminous united states: It’s worth noting that planting zone maps are not.