When to plant pumpkin in Wyoming
Wyoming spans USDA zones 4a–5b, so the right time to plant pumpkin shifts by weeks across the state. The window to sow seed directly outdoors runs from about May 24 in Casper to July 4 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 | May 28 – June 11 |
| Casper | 5a | May 10 | September 29 | May 24 – June 7 |
| Gillette | 4b | May 15 | October 1 | May 29 – June 12 |
| Laramie | 4a | June 7 | September 4 | June 21 – July 5 |
| Rock Springs | 5a | May 24 | September 24 | June 7 – June 21 |
| Sheridan | 5a | May 21 | September 23 | June 4 – June 18 |
| Evanston | 5a | June 12 | September 12 | June 26 – July 10 |
| Green River | 5a | May 24 | September 22 | June 7 – June 21 |
Pumpkin in Wyoming: FAQ
When can I plant pumpkin in Wyoming?
Across Wyoming, the time to direct-sow pumpkin spans roughly May 24 in Casper to July 4 in Jackson, each following that city's local frost dates.
Does the pumpkin planting date vary across Wyoming?
Yes. Wyoming publishes 11 cities with their own frost dates, so the right pumpkin 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 pumpkin take to grow in Wyoming?
Pumpkin takes about 90–110 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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