Key West, FL planting zone & frost dates
Key West is in USDA hardiness zone 11b. Frost is rare here: in most years temperatures do not drop to 32°F.
USDA hardiness zone11bavg. extreme winter low 45°F to 50°F
FrostRarein most years the nearest weather station records no 32°F freeze
Useful for zone 11b gardens
- Drip irrigation kit — saves water in long, hot seasons
- Shade cloth — protects plants from midday sun
- Soil moisture meter
- Plants for zone 11
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Hardiness zone by ZIP code in Key West
- 33040 zone 11b
- 33041 zone 11b
- 33045 zone 11b
Nearby cities
- Marco Island zone 10b
- Marco zone 10b
- Key Largo zone 11b
- Florida City zone 10b
- East Naples zone 10b
- Naples zone 10b
- Homestead zone 10b
- Golden Gate zone 10b
Questions
What growing zone is Key West, FL?
Key West is in USDA Plant Hardiness Zone 11b (average extreme winter low 45°F to 50°F), according to the USDA 2023 map.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Key W Wfo, FL (USC00084571), 0.7 km (0.4 mi) from the city center, elevation 1 m, based on 9 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.