When to plant amaranth in Hawaii
Hawaii spans USDA zone 12a, so the right time to plant amaranth shifts by weeks across the state. The window to sow seed directly 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 | Direct sow |
|---|---|---|---|---|
| Kapaa | 12a | January 26 | January 24 | February 2 – February 16 |
Amaranth in Hawaii: FAQ
When can I plant amaranth in Hawaii?
Across Hawaii, the time to direct-sow amaranth spans roughly February 2 in Kapaa to February 2 in Kapaa, each following that city's local frost dates.
Does the amaranth planting date vary across Hawaii?
Yes. Hawaii publishes 1 cities with their own frost dates, so the right amaranth 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 amaranth take to grow in Hawaii?
Amaranth takes about 50–60 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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