When to plant coriander (seed) in Wyoming
Wyoming spans USDA zones 4a–5b, so the right time to plant coriander (seed) shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 26 in Casper to June 6 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 30 – May 28 |
| Casper | 5a | May 10 | September 29 | April 26 – May 24 |
| Gillette | 4b | May 15 | October 1 | May 1 – May 29 |
| Laramie | 4a | June 7 | September 4 | May 24 – June 21 |
| Rock Springs | 5a | May 24 | September 24 | May 10 – June 7 |
| Sheridan | 5a | May 21 | September 23 | May 7 – June 4 |
| Evanston | 5a | June 12 | September 12 | May 29 – June 26 |
| Green River | 5a | May 24 | September 22 | May 10 – June 7 |
Coriander (Seed) in Wyoming: FAQ
When can I plant coriander (seed) in Wyoming?
Across Wyoming, the time to direct-sow coriander (seed) spans roughly April 26 in Casper to June 6 in Jackson, each following that city's local frost dates.
Does the coriander (seed) planting date vary across Wyoming?
Yes. Wyoming publishes 11 cities with their own frost dates, so the right coriander (seed) 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 coriander (seed) take to grow in Wyoming?
Coriander (Seed) 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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