When to plant potato in Wyoming
Wyoming spans USDA zones 4a–5b, so the right time to plant potato shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 12 in Casper to May 23 in Jackson — below are local dates for 11 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Cheyenne | 5b | May 14 | October 1 | April 16 – April 30 |
| Casper | 5a | May 10 | September 29 | April 12 – April 26 |
| Gillette | 4b | May 15 | October 1 | April 17 – May 1 |
| Laramie | 4a | June 7 | September 4 | May 10 – May 24 |
| Rock Springs | 5a | May 24 | September 24 | April 26 – May 10 |
| Sheridan | 5a | May 21 | September 23 | April 23 – May 7 |
| Evanston | 5a | June 12 | September 12 | May 15 – May 29 |
| Green River | 5a | May 24 | September 22 | April 26 – May 10 |
Potato in Wyoming: FAQ
When can I plant potato in Wyoming?
Across Wyoming, the time to direct-sow potato spans roughly April 12 in Casper to May 23 in Jackson, each following that city's local frost dates.
Does the potato planting date vary across Wyoming?
Yes. Wyoming publishes 11 cities with their own frost dates, so the right potato 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 potato take to grow in Wyoming?
Potato takes about 70–120 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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