New Hardiness Zone Map 2024. Colors on the map like red, orange, yellow, green, and blue, describe the plant's hardiness zones. That's really big news if you consider 80 million americans use this map to decide on what and when to grow!

The new map—jointly developed by usda’s agricultural research service (ars) and oregon state university’s (osu) prism climate group—is more accurate and contains greater detail than prior versions. With the new usda plant hardiness map, our state now recognizes larger areas of zone 5a, particularly in urban and southwestern areas, supporting a broader palette of plants such as.