When to plant garlic in Wyoming
Wyoming spans USDA zones 4a–5b, so the right time to plant garlic shifts by weeks across the state. The window to plant for fall/overwintering runs from about August 3 in Jackson to September 3 in Cheyenne — below are local dates for 11 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Fall-plant |
|---|---|---|---|---|
| Cheyenne | 5b | May 14 | October 1 | September 3 – September 17 |
| Casper | 5a | May 10 | September 29 | September 1 – September 15 |
| Gillette | 4b | May 15 | October 1 | September 3 – September 17 |
| Laramie | 4a | June 7 | September 4 | August 7 – August 21 |
| Rock Springs | 5a | May 24 | September 24 | August 27 – September 10 |
| Sheridan | 5a | May 21 | September 23 | August 26 – September 9 |
| Evanston | 5a | June 12 | September 12 | August 15 – August 29 |
| Green River | 5a | May 24 | September 22 | August 25 – September 8 |
Garlic in Wyoming: FAQ
When can I plant garlic in Wyoming?
Across Wyoming, the time to fall-plant garlic spans roughly August 3 in Jackson to September 3 in Cheyenne, each following that city's local frost dates.
Does the garlic planting date vary across Wyoming?
Yes. Wyoming publishes 11 cities with their own frost dates, so the right garlic planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
Never miss a window in your area
An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.