Hawaii · zones 12a–12a
When to plant tomatoes in Hawaii.
Sow or transplant between Jan 8 to Mar 10 in a typical year, keyed to Hawaii's median last frost around Jan 1. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Tomatoes dates for a typical Hawaii season.
1 · Start indoors
Nov 27 to Jan 27
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Jan 8 to Mar 10
Keyed to the ~Jan 1 last frost. Sow 0.25" deep, 24" apart.
Harvest
~73 days later
~12 lb per plant over ~8 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.