Hawaii · zones 12a–12a
When to plant garlic in Hawaii.
Hawaii's window for garlic runs on the fall side of the season. A second, fall sowing fits Nov 30 to Dec 31. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Garlic dates for a typical Hawaii season.
Fall round
Nov 30 to Dec 31
Counted back from the ~Dec 31 first frost.
Harvest
~240 days later
~0.2 lb per plant over ~1 weeks.
Hawaii spans more than one climate: Zone 12 is the most common zone, but the state runs 12a to 12a. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.