When to plant bok choy in North Dakota
North Dakota spans USDA zones 4a–4b, so the right time to plant bok choy shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 13 in Fargo to April 30 in Williston — below are local dates for 9 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Fargo | 4a | May 4 | October 2 | April 13 – May 4 |
| Bismarck | 4a | May 10 | September 30 | April 19 – May 10 |
| Grand Forks | 4a | May 10 | October 1 | April 19 – May 10 |
| Minot | 4a | May 10 | October 1 | April 19 – May 10 |
| West Fargo | 4a | May 4 | October 2 | April 13 – May 4 |
| Williston | 4a | May 21 | September 21 | April 30 – May 21 |
| Dickinson | 4b | May 20 | September 22 | April 29 – May 20 |
| Mandan | 4a | May 13 | September 27 | April 22 – May 13 |
Bok Choy in North Dakota: FAQ
When can I plant bok choy in North Dakota?
Across North Dakota, the time to transplant bok choy spans roughly April 13 in Fargo to April 30 in Williston, each following that city's local frost dates.
Does the bok choy planting date vary across North Dakota?
Yes. North Dakota publishes 9 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 North Dakota?
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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