Growing Zones & Frost Dates by State
USDA hardiness zone range, major city zones, average frost dates, and real zone-appropriate plants for each state — sourced from the 2023 USDA Plant Hardiness Zone Map and state extension services. For your exact zone, use the Hardiness Zone Finder.
Alabama Zone 8a–9a Alaska Zone 2a–7b Arizona Zone 6a–10a Arkansas Zone 7a–8b California Zone 6a–11a Colorado Zone 4b–7a Connecticut Zone 6a–7a Delaware Zone 7b–8a District of Columbia Zone 8a–8a Florida Zone 9a–11b Georgia Zone 7a–9a Hawaii Zone 10a–12b Idaho Zone 4a–7b Illinois Zone 5a–7a Indiana Zone 6a–7a Iowa Zone 5a–5b Kansas Zone 6a–7a Kentucky Zone 6b–7a Louisiana Zone 8b–9b Maine Zone 4a–6a Maryland Zone 7a–8a Massachusetts Zone 5b–7b Michigan Zone 4b–6b Minnesota Zone 3b–5a Mississippi Zone 7b–9a Missouri Zone 6a–7a Montana Zone 3b–6a Nebraska Zone 5a–6a Nevada Zone 5a–9b New Hampshire Zone 4a–6a New Jersey Zone 6b–8a New Mexico Zone 5a–8b New York Zone 4a–7b North Carolina Zone 6b–9a North Dakota Zone 4a–4a Ohio Zone 6a–7a Oklahoma Zone 6b–8a Oregon Zone 5b–9b Pennsylvania Zone 5b–7b Rhode Island Zone 7a–7a South Carolina Zone 8a–9a South Dakota Zone 4a–5b Tennessee Zone 6b–8a Texas Zone 7a–10a Utah Zone 5b–8b Vermont Zone 4b–6a Virginia Zone 7a–8b Washington Zone 5b–9a West Virginia Zone 6a–7a Wisconsin Zone 4a–6a Wyoming Zone 4a–5b
Every state page above is built the same way: real zone data from the 2023 USDA Plant Hardiness Zone Map, cross-checked at the city level, plus frost dates and plant picks sourced from state extension services — not generic filler. For what a hardiness zone actually measures (and what it doesn't), see how zones actually work.