When to plant Rhubarb in Wyoming
In spring, from Apr 1 – May 1 in Casper to May 15 – June 1 in Laramie.
In fall, from Sept 1 – Oct 1 in Jackson to Oct 1 – Nov 1 in Gillette.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Casper | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Cheyenne | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Cody | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Evanston | May 15 – June 1 | Sept 15 – Oct 15 |
| Gillette | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Green River | Apr 15 – May 10 | Sept 15 – Nov 1Now |
| Jackson | May 15 – June 1 | Sept 1 – Oct 1 |
| Laramie | May 15 – June 1 | Sept 1 – Oct 1 |
| Riverton | Apr 1 – May 1 | Sept 15 – Nov 1Now |
| Rock Springs | Apr 15 – May 10 | Sept 15 – Nov 1Now |
| Sheridan | Apr 15 – May 10 | Sept 15 – Nov 1Now |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for rhubarb.