USDA Hardiness Zone 12B Growing Guide
Source: USDA Agricultural Research Service Plant Hardiness Zone Map 2023
US Pacific territories — fully tropical, no cold season.
Where Zone 12B sits on the national map
USDA's published 2023 PHZM map covers the continental US (zones 3a through 12a). Zone 12B sits in arctic Alaska, outside the federal map's released polygon dataset. The growing science still applies — see Key Facts below.
Zone Position
Key Facts — Zone 12B
- Avg. coldest night: 55°F to 60°F (12.8°C to 15.6°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: 1 US state, including Hawaii
- Growing Considerations: US Pacific territories — fully tropical, no cold season.
What Is Zone 12B?
USDA Hardiness Zone 12B is defined by an average annual extreme minimum temperature between 55°F and 60°F (12.8°C to 15.6°C), according to the USDA ARS Plant Hardiness Zone Map 2023.
Coldest avg. low
55°F
USDA PHZM 2023
Warmest avg. low
60°F
USDA PHZM 2023
Coldest avg. low (°C)
12.8°C
USDA PHZM 2023
States
1
Plants That Thrive in Zone 12B
Plants well-adapted to the temperature range of this zone.
Coconut
Taro
Cassava
Passion Fruit
Your Zone Is Just One Factor
Hardiness zone tells you about winter cold tolerance — but it doesn't tell you about soil drainage, summer heat, frost dates, flood risk, or contamination proximity. Two Zone 12B parcels can have very different growing outcomes. Your Growable Ground report scores 1,112 plants against all these factors for your specific address.
Your zone is a starting point — your parcel is the whole story
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Frequently Asked Questions
What plants grow in Zone 12B?
US Pacific territories — fully tropical, no cold season. Common plants that thrive include Coconut, Taro, Cassava, Passion Fruit. Actual suitability depends on your parcel's soil, drainage, and microclimate.
What states have Zone 12B?
Zone 12B appears across 1 US state: Hawaii.
What temperature is USDA Zone 12B?
USDA Hardiness Zone 12B is defined by an average annual extreme minimum temperature between 55°F and 60°F (12.8°C to 15.6°C), per the USDA ARS Plant Hardiness Zone Map 2023.