Usda Plant Hardiness Zones 2025. For example, the usda risk management agency refers to the map’s plant hardiness zone designations to set certain crop insurance standards. Department of agriculture has an updated plant hardiness zone map.

Department of agriculture has an updated plant hardiness zone map. Learn about the new usda plant hardiness zone map (phzm) that shows the average lowest winter temperatures for 26 zones across the u.s.