When to plant amaranth in Minnesota
Minnesota spans USDA zones 3b–5a, so the right time to plant amaranth shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 28 in Winona to June 12 in Hibbing — below are local dates for 102 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Minneapolis | 5a | April 23 | October 16 | April 30 – May 14 |
| St. Paul | 5a | April 24 | October 16 | May 1 – May 15 |
| Rochester | 4b | April 30 | October 6 | May 7 – May 21 |
| Bloomington | 5a | April 23 | October 18 | April 30 – May 14 |
| Duluth | 4b | May 14 | October 12 | May 21 – June 4 |
| Brooklyn Park | 5a | April 30 | October 8 | May 7 – May 21 |
| Plymouth | 5a | April 29 | October 12 | May 6 – May 20 |
| Woodbury | 5a | April 26 | October 12 | May 3 – May 17 |
Amaranth in Minnesota: FAQ
When can I plant amaranth in Minnesota?
Across Minnesota, the time to direct-sow amaranth spans roughly April 28 in Winona to June 12 in Hibbing, each following that city's local frost dates.
Does the amaranth planting date vary across Minnesota?
Yes. Minnesota publishes 102 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 Minnesota?
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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