When to plant watermelon in Hawaii
Hawaii spans USDA zone 12a, so the right time to plant watermelon shifts by weeks across the state. The window to transplant seedlings outdoors runs from about February 2 in Kapaa to February 2 in Kapaa — below are local dates for 1 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Kapaa | 12a | January 26 | January 24 | February 2 – February 9 |
Watermelon in Hawaii: FAQ
When can I plant watermelon in Hawaii?
Across Hawaii, the time to transplant watermelon spans roughly February 2 in Kapaa to February 2 in Kapaa, each following that city's local frost dates.
Does the watermelon planting date vary across Hawaii?
Yes. Hawaii publishes 1 cities with their own frost dates, so the right watermelon planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does watermelon take to grow in Hawaii?
Watermelon takes about 75–95 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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