When to plant mustard greens in North Dakota
North Dakota spans USDA zones 4a–4b, so the right time to plant mustard greens shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 6 in Fargo to April 23 in Williston — below are local dates for 9 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Fargo | 4a | May 4 | October 2 | April 6 – May 18 |
| Bismarck | 4a | May 10 | September 30 | April 12 – May 24 |
| Grand Forks | 4a | May 10 | October 1 | April 12 – May 24 |
| Minot | 4a | May 10 | October 1 | April 12 – May 24 |
| West Fargo | 4a | May 4 | October 2 | April 6 – May 18 |
| Williston | 4a | May 21 | September 21 | April 23 – June 4 |
| Dickinson | 4b | May 20 | September 22 | April 22 – June 3 |
| Mandan | 4a | May 13 | September 27 | April 15 – May 27 |
Mustard Greens in North Dakota: FAQ
When can I plant mustard greens in North Dakota?
Across North Dakota, the time to direct-sow mustard greens spans roughly April 6 in Fargo to April 23 in Williston, each following that city's local frost dates.
Does the mustard greens planting date vary across North Dakota?
Yes. North Dakota publishes 9 cities with their own frost dates, so the right mustard greens 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 mustard greens take to grow in North Dakota?
Mustard Greens takes about 30–45 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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