When to plant scallion (green onion) in Michigan
Michigan spans USDA zones 4b–6b, 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 March 22 in Port Huron to April 21 in Cadillac — below are local dates for 101 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Detroit | 6b | April 27 | October 25 | March 30 – May 11 |
| Grand Rapids | 6a | May 6 | October 10 | April 8 – May 20 |
| Warren | 6b | April 21 | October 31 | March 24 – May 5 |
| Sterling Heights | 6b | April 30 | October 24 | April 2 – May 14 |
| Ann Arbor | 6a | May 5 | October 10 | April 7 – May 19 |
| Lansing | 6a | May 1 | October 13 | April 3 – May 15 |
| Dearborn | 6b | May 1 | October 15 | April 3 – May 15 |
| Livonia | 6b | May 1 | October 17 | April 3 – May 15 |
Scallion (Green Onion) in Michigan: FAQ
When can I plant scallion (green onion) in Michigan?
Across Michigan, the time to direct-sow scallion (green onion) spans roughly March 22 in Port Huron to April 21 in Cadillac, each following that city's local frost dates.
Does the scallion (green onion) planting date vary across Michigan?
Yes. Michigan publishes 101 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 Michigan?
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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