When to Plant Peppers in Wyoming
In Wyoming, the time to transplant peppers outside runs from May 24 – Jun 7 in Casper to Jul 4 – Jul 18 in Jackson. In Cheyenne, it's May 28 – Jun 11. 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.
Peppers need even more warmth than tomatoes. Start them early indoors and set them out once the soil has warmed, two to four weeks after the last frost.
- Start indoors: 8–10 weeks before the last frost.
- Transplant outside: 2–4 weeks after the last frost.
Peppers planting dates in Wyoming by city
| City | Zone | Start indoors | Transplant outside |
|---|---|---|---|
| Casper | 5a | Mar 1 – Mar 15 | May 24 – Jun 7 |
| Cheyenne | 5b | Mar 5 – Mar 19 | May 28 – Jun 11 |
| Cody | 5a | Mar 3 – Mar 17 | May 26 – Jun 9 |
| Douglas | 5a | Mar 10 – Mar 24 | Jun 2 – Jun 16 |
| Evanston | 5a | Apr 3 – Apr 17 | Jun 26 – Jul 10 |
| Gillette | 4b | Mar 6 – Mar 20 | May 29 – Jun 12 |
| Green River | 5a | Mar 15 – Mar 29 | Jun 7 – Jun 21 |
| Jackson | 4b | Apr 11 – Apr 25 | Jul 4 – Jul 18 |
| Lander | 5a | Mar 9 – Mar 23 | Jun 1 – Jun 15 |
| Laramie | 4a | Mar 29 – Apr 12 | Jun 21 – Jul 5 |
| Powell | 5a | Mar 10 – Mar 24 | Jun 2 – Jun 16 |
| Rawlins | 5a | Mar 8 – Mar 22 | May 31 – Jun 14 |
| Riverton | 5a | Mar 3 – Mar 17 | May 26 – Jun 9 |
| Rock Springs | 5a | Mar 15 – Mar 29 | Jun 7 – Jun 21 |
| Sheridan | 5a | Mar 12 – Mar 26 | Jun 4 – Jun 18 |
| Torrington | 5a | Mar 2 – Mar 16 | May 25 – Jun 8 |
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 peppers.
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