USDA Plant Hardiness Zones · 2023 map

What growing zone is Hawaii?

Hawaii’s ZIP codes span USDA plant hardiness zones 10b to 13a. The most common zone, covering 61 of 96 ZIP codes, is 12b (55 to 60°F average coldest winter night).

USDA hardiness zones in Hawaii

ZoneAvg. extreme minimumZIP codesExample cities
Zone 10b35 to 40°F1—
Zone 11a40 to 45°F8—
Zone 11b45 to 50°F3—
Zone 12a50 to 55°F22—
Zone 12b55 to 60°F61Urban Honolulu
Zone 13a60 to 65°F1—
 ZIP codes from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). Unpopulated areas such as high mountains can be colder than any ZIP code.

Growing zone and frost dates by city

CityZoneFrost dates
Urban Honolulu12b (55 to 60°F)Urban Honolulu frost dates
 Incorporated cities with 5,000+ residents. Each city uses the zone of its central ZIP code.

Frequently asked questions

What growing zone is Hawaii in?

Hawaii’s ZIP codes span USDA zones 10b to 13a, and 12b is the most common. Zones vary with elevation and distance from water, so check your own ZIP code.

When should I plant?

Hardiness zones are about winter cold, not planting dates. For timing, use the last spring frost date for your city on our Hawaii frost dates page.