The USDA determines hardiness zones by addressing the average annual extreme minimum temperature of an area over a period of 30 years. Zones should be interpreted as guides, rather than absolutes; be sure to always consider light, soil moisture, temperature, humidity, and duration of cold-weather when selecting plants.
North Dakota, South Dakota, Minnesota, and Wisconsin are typically in Zones 3 and 4. Nebraska and Iowa are predominantly Zone 5, and Kansas, Missouri, and Illinois generally fall in Zone 5 or 6.
Use the USDA interactive map to find the exact zone for your zip code.
Michigan, Maine, and the northern areas of New Hampshire, Vermont, and New York usually fall in Zone 3 or 4. The southern portions of those states are usually Zone 5 or 6. Massachusetts, Connecticut, Rhode Island, Pennsylvania, West Virginia, Ohio, and Indiana are combinations of Zones 5 and 6. New Jersey, Maryland, Delaware, Kentucky and Virginia are Zone 6.
Use the USDA interactive map to find the exact zone for your zip code.
Montana and Wyoming are predominantly in Zones 3 and 4, as is eastern Idaho. Western Idaho and the eastern portions of Washington and Oregon fall in Zone 5 and 6. The regions closer to the Pacific Coast are Zones 7 and sometimes 8.
Use the USDA interactive map to find the exact zone for your zip code.
Oklahoma and northern Arkansas fall in Zones 6 and 7, with southern Arkansas falling in Zone 8. Northeastern Texas begins as Zone 6, moving to Zone 7, then Zone 8 for most of the middle of the state. The southern portions are Zones 8 and 9. Similarly, Louisiana begins at Zone 8 in the north and progresses to Zone 9 in the coastal regions.
Use the USDA interactive map to find the exact zone for your zip code.
Tennessee and North Carolina are a mix of Zones 6 and 7, with the Atlantic Coast regions of North Carolina in Zone 8. Mississippi, Alabama, Georgia, and South Caroline move from Zone 7 in the northern areas to Zone 8 in the southern and coastal areas. Northern Florida begins in Zone 8, then progresses to zone 10 in its most southern regions. (The Florida Keys are Zone 11.)
Use the USDA interactive map to find the exact zone for your zip code.
Colorado and Utah are a mix of Zones 4, 5, and 6. Nevada and Arizona include some Zone 5 areas, but are predominantly Zones 6, 7, and 8. Northern California begins at Zone 6, and progresses to Zone 10 south and toward the Pacific Coast.
Use the USDA interactive map to find the exact zone for your zip code.
