When to plant Swiss chard in Idaho
In spring, from Mar 15 – June 15 in Lewiston to May 10 – June 15 in Garden City.
In fall, June 1 – July 5.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Ammon | Apr 20 – June 15 | June 1 – July 5 |
| Blackfoot | Apr 15 – June 15 | June 1 – July 5 |
| Boise City | Apr 1 – June 15 | June 1 – Aug 1 |
| Burley | Apr 20 – June 15 | June 1 – July 5 |
| Caldwell | Apr 15 – June 15 | June 1 – July 20 |
| Chubbuck | May 10 – June 15 | June 1 – July 5 |
| Coeur d'Alene | Apr 1 – June 15 | June 1 – Aug 1 |
| Eagle | Apr 15 – June 15 | June 1 – Aug 1 |
| Garden City | May 10 – June 15 | June 1 – July 20 |
| Hayden | Apr 1 – June 15 | June 1 – Aug 1 |
| Idaho Falls | Apr 20 – June 15 | June 1 – July 5 |
| Jerome | Apr 15 – June 15 | June 1 – July 20 |
| Kuna | Apr 1 – June 15 | June 1 – Aug 1 |
| Lewiston | Mar 15 – June 15 | June 1 – Sept 10 |
| Meridian | Apr 1 – June 15 | June 1 – Aug 1 |
| Middleton | Apr 15 – June 15 | June 1 – July 20 |
| Moscow | Apr 15 – June 15 | June 1 – July 5 |
| Mountain Home | Apr 15 – June 15 | June 1 – July 20 |
| Nampa | Apr 15 – June 15 | June 1 – July 20 |
| Pocatello | Apr 15 – June 15 | June 1 – July 20 |
| Post Falls | Apr 1 – June 15 | June 1 – Aug 1 |
| Rathdrum | Apr 1 – June 15 | June 1 – Aug 1 |
| Rexburg | Apr 20 – June 15 | June 1 – July 1 |
| Sandpoint | Apr 20 – June 15 | June 1 – July 5 |
| Star | Apr 15 – June 15 | June 1 – July 20 |
| Twin Falls | Apr 15 – June 15 | June 1 – July 20 |
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 swiss chard.