Tustin, CA planting zone & frost dates
Tustin is in USDA hardiness zone 10a. Frost is rare here: in most years temperatures do not drop to 32°F.
USDA hardiness zone10aavg. extreme winter low 30°F to 35°F
FrostRarein most years the nearest weather station records no 32°F freeze
Useful for zone 10a gardens
- Drip irrigation kit — saves water in long, hot seasons
- Shade cloth — protects plants from midday sun
- Soil moisture meter
- Plants for zone 10
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Hardiness zone by ZIP code in Tustin
- 92780 zone 10a
- 92781 zone 10a
- 92782 zone 10a
Nearby cities
- North Tustin zone 10b
- Santa Ana zone 10b
- Orange zone 10b
- Irvine zone 10b
- Turtle Rock zone 10b
- Garden Grove zone 10b
- Anaheim zone 10b
- Fountain Valley zone 10b
Questions
What growing zone is Tustin, CA?
Tustin is in USDA Plant Hardiness Zone 10a (average extreme winter low 30°F to 35°F), according to the USDA 2023 map.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Santa Ana Fire Stn, CA (USC00047888), 3.8 km (2.4 mi) from the city center, elevation 41 m, based on 28 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.