USDA Hardiness Zone 10A Growing Guide
Source: USDA Agricultural Research Service Plant Hardiness Zone Map 2023
Southern tip of Florida and coastal Southern California — tropical species thrive.
Where Zone 10A sits on the national map
Zone Position
Key Facts — Zone 10A
- Avg. coldest night: 30°F to 35°F (-1.1°C to 1.7°C) — the band of average annual extreme minimum temperatures that defines this zone (USDA ARS PHZM 2023)
- What that means: in an average year your coldest night lands somewhere in that 5°F window. Actual lows can drop colder in extreme winters; daytime highs are not bounded by this number.
- Found In: 8 US states, including California, Texas, Florida and 5 more
- Growing Considerations: Southern tip of Florida and coastal Southern California — tropical species thrive.
What Is Zone 10A?
USDA Hardiness Zone 10A is defined by an average annual extreme minimum temperature between 30°F and 35°F (-1.1°C to 1.7°C), according to the USDA ARS Plant Hardiness Zone Map 2023.
Coldest avg. low
30°F
USDA PHZM 2023
Warmest avg. low
35°F
USDA PHZM 2023
Coldest avg. low (°C)
-1.1°C
USDA PHZM 2023
States
8
Plants That Thrive in Zone 10A
Plants well-adapted to the temperature range of this zone.
Mango
Papaya
Royal Palm
Hibiscus
Your Zone Is Just One Factor
Zone 10A covers 26 counties across 4 states, and their growing seasons are not the same. Galveston County, Texas measures 311 frost-free days a year; Plaquemines Parish, Louisiana measures 365 — a 54-day difference under the same winter low, before you get to soil drainage, summer heat, flood risk, or contamination proximity. Your Growable Ground report scores 1,112 plants against all of it for your specific address.
Measured across the 26 counties whose USDA PHZM centroid falls in Zone 10A — NOAA 1991–2020 Climate Normals, 28°F killing freeze. Median 340 days.
Your zone is a starting point — your parcel is the whole story
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Frequently Asked Questions
What plants grow in Zone 10A?
Southern tip of Florida and coastal Southern California — tropical species thrive. Common plants that thrive include Mango, Papaya, Royal Palm, Hibiscus. Actual suitability depends on your parcel's soil, drainage, and microclimate.
What states have Zone 10A?
Zone 10A appears across 8 US states: California, Texas, Florida, Oregon, Arizona, Hawaii, Louisiana, Nevada.
What temperature is USDA Zone 10A?
USDA Hardiness Zone 10A is defined by an average annual extreme minimum temperature between 30°F and 35°F (-1.1°C to 1.7°C), per the USDA ARS Plant Hardiness Zone Map 2023.