When to plant mustard greens in Hawaii
Hawaii spans USDA zone 12a, so the right time to plant mustard greens 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 |
Mustard Greens in Hawaii: FAQ
When can I plant mustard greens in Hawaii?
Across Hawaii, the time to direct-sow mustard greens spans roughly December 29 in Kapaa to December 29 in Kapaa, each following that city's local frost dates.
Does the mustard greens planting date vary across Hawaii?
Yes. Hawaii publishes 1 cities with their own frost dates, so the right mustard greens 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 mustard greens take to grow in Hawaii?
Mustard Greens takes about 30–45 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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