When to plant scallion (green onion) in Hawaii
Hawaii spans USDA zone 12a, so the right time to plant scallion (green onion) shifts by weeks across the state. The window to sow seed directly outdoors runs from about December 29 in Kapaa to December 29 in Kapaa — below are local dates for 1 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Kapaa | 12a | January 26 | January 24 | December 29 – February 9 |
Scallion (Green Onion) in Hawaii: FAQ
When can I plant scallion (green onion) in Hawaii?
Across Hawaii, the time to direct-sow scallion (green onion) spans roughly December 29 in Kapaa to December 29 in Kapaa, each following that city's local frost dates.
Does the scallion (green onion) planting date vary across Hawaii?
Yes. Hawaii publishes 1 cities with their own frost dates, so the right scallion (green onion) 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 scallion (green onion) take to grow in Hawaii?
Scallion (Green Onion) takes about 60–80 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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