USDA Zone 12b — Garden & Frost Dates for Honolulu, HI (96801)
This is the local garden report for ZIP code 96801 (Honolulu, HI). It pairs the official USDA 2023 hardiness zone with NOAA-based frost dates so you can plan seeds, transplants, and fall crops with real numbers for your neighborhood.
What does zone 12b mean for Honolulu?
Zone 12b is the USDA Plant Hardiness Zone for ZIP 96801, based on the 30-year (1991-2020) average annual extreme minimum winter temperature. Perennial plants labeled for zone 12b or lower should survive a typical winter here. The last spring frost averages 01-01 and the first fall frost averages 12-31, giving roughly 364 frost-free growing days — the window that most vegetables need to go from seed to harvest.
Start your Honolulu planting calendar
This calendar is pre-loaded with the exact frost dates for ZIP 96801 (Honolulu, HI) — more precise than a state-wide average. Pick a crop and print the plan.
In this ZIP (typical zone 10–13), last frost ≈ Jan 1, first frost ≈ Dec 31 (364-day season), your Tomato plan:
Month-by-month (this ZIP, 2026)
| Month | Action |
|---|---|
| Jan | Sow · Transplant |
| Feb | — |
| Mar | Harvest |
| Apr | — |
| May | — |
| Jun | — |
| Jul | — |
| Aug | — |
| Sep | — |
| Oct | — |
| Nov | Start indoors |
| Dec | — |
Start indoors 6 weeks before last frost; transplant after soil warms. Zones 3–13 suitable. Dates are typical; confirm with your county extension and watch the 10-day forecast.
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