When to plant Onions in Rhode Island
In spring, from Mar 1 – Apr 1 in Cranston to Mar 15 – Apr 10 in Woonsocket.
In fall, Sept 1 – Oct 15 in Newport.
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 |
|---|---|---|
| Central Falls | Mar 15 – Apr 10 | Spring-planted |
| Cranston | Mar 1 – Apr 1 | Not listed |
| East Providence | Mar 1 – Apr 1 | Not listed |
| Newport | Mar 1 – Apr 1 | Sept 1 – Oct 15 |
| Pawtucket | Mar 15 – Apr 10 | Spring-planted |
| Providence | Mar 1 – Apr 1 | Not listed |
| Warwick | Mar 1 – Apr 1 | Not listed |
| Woonsocket | Mar 15 – Apr 10 | Spring-planted |
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 onion plants.