When to plant sweet corn in Michigan
Michigan spans USDA zones 4b–6b, so the right time to plant sweet corn shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 19 in Port Huron to May 19 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 | April 27 – May 11 |
| Grand Rapids | 6a | May 6 | October 10 | May 6 – May 20 |
| Warren | 6b | April 21 | October 31 | April 21 – May 5 |
| Sterling Heights | 6b | April 30 | October 24 | April 30 – May 14 |
| Ann Arbor | 6a | May 5 | October 10 | May 5 – May 19 |
| Lansing | 6a | May 1 | October 13 | May 1 – May 15 |
| Dearborn | 6b | May 1 | October 15 | May 1 – May 15 |
| Livonia | 6b | May 1 | October 17 | May 1 – May 15 |
Sweet Corn in Michigan: FAQ
When can I plant sweet corn in Michigan?
Across Michigan, the time to direct-sow sweet corn spans roughly April 19 in Port Huron to May 19 in Cadillac, each following that city's local frost dates.
Does the sweet corn planting date vary across Michigan?
Yes. Michigan publishes 101 cities with their own frost dates, so the right sweet corn 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 sweet corn take to grow in Michigan?
Sweet Corn takes about 60–90 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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