When to plant bok choy in Michigan
Michigan spans USDA zones 4b–6b, so the right time to plant bok choy shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 29 in Port Huron to April 28 in Cadillac — below are local dates for 101 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Detroit | 6b | April 27 | October 25 | April 6 – April 27 |
| Grand Rapids | 6a | May 6 | October 10 | April 15 – May 6 |
| Warren | 6b | April 21 | October 31 | March 31 – April 21 |
| Sterling Heights | 6b | April 30 | October 24 | April 9 – April 30 |
| Ann Arbor | 6a | May 5 | October 10 | April 14 – May 5 |
| Lansing | 6a | May 1 | October 13 | April 10 – May 1 |
| Dearborn | 6b | May 1 | October 15 | April 10 – May 1 |
| Livonia | 6b | May 1 | October 17 | April 10 – May 1 |
Bok Choy in Michigan: FAQ
When can I plant bok choy in Michigan?
Across Michigan, the time to transplant bok choy spans roughly March 29 in Port Huron to April 28 in Cadillac, each following that city's local frost dates.
Does the bok choy planting date vary across Michigan?
Yes. Michigan publishes 101 cities with their own frost dates, so the right bok choy 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 bok choy take to grow in Michigan?
Bok Choy takes about 45–60 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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