When to Plant Potatoes in Wyoming
In Wyoming, the time to plant potatoes outside runs from Apr 19 – May 3 in Casper to May 30 – Jun 13 in Jackson. In Cheyenne, it's Apr 23 – May 7. The average last spring frost differs by about 6 weeks across the state (May 10 in Casper, Jun 20 in Jackson), so use the dates for the town nearest you.
Plant seed potatoes a few weeks before the last frost; cover any shoots if a late frost threatens.
- Plant outside: 1–3 weeks before the last frost.
Potatoes planting dates in Wyoming by city
| City | Zone | Plant outside |
|---|---|---|
| Casper | 5a | Apr 19 – May 3 |
| Cheyenne | 5b | Apr 23 – May 7 |
| Cody | 5a | Apr 21 – May 5 |
| Douglas | 5a | Apr 28 – May 12 |
| Evanston | 5a | May 22 – Jun 5 |
| Gillette | 4b | Apr 24 – May 8 |
| Green River | 5a | May 3 – May 17 |
| Jackson | 4b | May 30 – Jun 13 |
| Lander | 5a | Apr 27 – May 11 |
| Laramie | 4a | May 17 – May 31 |
| Powell | 5a | Apr 28 – May 12 |
| Rawlins | 5a | Apr 26 – May 10 |
| Riverton | 5a | Apr 21 – May 5 |
| Rock Springs | 5a | May 3 – May 17 |
| Sheridan | 5a | Apr 30 – May 14 |
| Torrington | 5a | Apr 20 – May 4 |
Calculated from each town's average (50%) frost dates, from the nearest NOAA station (1991–2020). Typical dates for the 2027 planting season, based on NOAA's 1991–2020 averages. They are long-term odds, not a forecast: always check your local forecast before planting. Zones: 2023 USDA Plant Hardiness Zone Map (USDA-ARS and Oregon State University). Not the official map; see planthardiness.ars.usda.gov.
See all frost dates in Wyoming, or the general guide to when to plant potatoes.
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