When to plant spinach in North Dakota
North Dakota spans USDA zones 4a–4b, so the right time to plant spinach shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 23 in Fargo to April 9 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 | March 23 – April 20 |
| Bismarck | 4a | May 10 | September 30 | March 29 – April 26 |
| Grand Forks | 4a | May 10 | October 1 | March 29 – April 26 |
| Minot | 4a | May 10 | October 1 | March 29 – April 26 |
| West Fargo | 4a | May 4 | October 2 | March 23 – April 20 |
| Williston | 4a | May 21 | September 21 | April 9 – May 7 |
| Dickinson | 4b | May 20 | September 22 | April 8 – May 6 |
| Mandan | 4a | May 13 | September 27 | April 1 – April 29 |
Spinach in North Dakota: FAQ
When can I plant spinach in North Dakota?
Across North Dakota, the time to direct-sow spinach spans roughly March 23 in Fargo to April 9 in Williston, each following that city's local frost dates.
Does the spinach planting date vary across North Dakota?
Yes. North Dakota publishes 9 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 North Dakota?
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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