When to plant Rhubarb in Idaho
In spring, from Mar 1 – Apr 1 in Lewiston to Apr 15 – May 10 in Garden City.
In fall, from Sept 15 – Nov 1 in Rexburg to Nov 1 – Dec 1 in Lewiston.
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 |
|---|---|---|
| Ammon | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Blackfoot | Mar 20 – Apr 15 | Oct 1 – Nov 1Now |
| Boise City | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Burley | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Caldwell | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Chubbuck | Apr 15 – May 10 | Oct 1 – Nov 1Now |
| Coeur d'Alene | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Eagle | Mar 20 – Apr 15 | Oct 15 – Dec 1Now |
| Garden City | Apr 15 – May 10 | Oct 15 – Nov 15Now |
| Hayden | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Idaho Falls | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Jerome | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Kuna | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Lewiston | Mar 1 – Apr 1 | Nov 1 – Dec 1Soon |
| Meridian | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Middleton | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Moscow | Mar 20 – Apr 15 | Oct 1 – Nov 1Now |
| Mountain Home | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Nampa | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Pocatello | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Post Falls | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Rathdrum | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Rexburg | Apr 1 – May 1 | Sept 15 – Nov 1Now |
| Sandpoint | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Star | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Twin Falls | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for rhubarb.