When to plant spinach in Michigan
Michigan spans USDA zones 4b–6b, so the right time to plant spinach shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 8 in Port Huron to April 7 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 16 – April 13 |
| Grand Rapids | 6a | May 6 | October 10 | March 25 – April 22 |
| Warren | 6b | April 21 | October 31 | March 10 – April 7 |
| Sterling Heights | 6b | April 30 | October 24 | March 19 – April 16 |
| Ann Arbor | 6a | May 5 | October 10 | March 24 – April 21 |
| Lansing | 6a | May 1 | October 13 | March 20 – April 17 |
| Dearborn | 6b | May 1 | October 15 | March 20 – April 17 |
| Livonia | 6b | May 1 | October 17 | March 20 – April 17 |
Spinach in Michigan: FAQ
When can I plant spinach in Michigan?
Across Michigan, the time to direct-sow spinach spans roughly March 8 in Port Huron to April 7 in Cadillac, each following that city's local frost dates.
Does the spinach planting date vary across Michigan?
Yes. Michigan publishes 101 cities with their own frost dates, so the right spinach 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 spinach take to grow in Michigan?
Spinach takes about 40–50 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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