Rhode Island planting zones & frost dates
USDA hardiness zones in Rhode Island go from 6b to 7a. Pick your city for its average frost dates and a planting calendar, or search by ZIP code.
| City | Zone | Avg. last frost | Avg. first frost |
|---|---|---|---|
| Barrington | 7a | Apr 11 | Oct 30 |
| Bristol | 7a | Apr 11 | Nov 2 |
| Central Falls | 7a | Apr 22 | Oct 19 |
| Coventry | 6b | Apr 22 | Oct 20 |
| Cranston | 7a | Apr 11 | Oct 30 |
| Cumberland | 6b | Apr 22 | Oct 19 |
| East Greenwich | 7a | Apr 11 | Oct 30 |
| East Providence | 7a | Apr 11 | Oct 30 |
| Johnston | 6b | Apr 11 | Oct 30 |
| Lincoln | 6b | Apr 22 | Oct 19 |
| Middletown | 7a | Apr 11 | Nov 4 |
| Narragansett | 7a | May 1 | Oct 12 |
| Newport | 7a | Apr 7 | Nov 13 |
| Newport East | 7a | Apr 11 | Nov 4 |
| North Kingstown | 7a | Apr 27 | Oct 15 |
| North Providence | 6b | Apr 11 | Oct 30 |
| North Scituate | 6b | Apr 25 | Oct 19 |
| North Smithfield | 6b | Apr 22 | Oct 19 |
| Pawtucket | 7a | Apr 22 | Oct 19 |
| Portsmouth | 7a | Apr 11 | Nov 2 |
| Providence | 7a | Apr 11 | Oct 30 |
| Smithfield | 6b | Apr 22 | Oct 19 |
| South Kingstown | 7a | May 1 | Oct 12 |
| Valley Falls | 7a | Apr 22 | Oct 19 |
| Warren | 7a | Apr 11 | Oct 30 |
| Warwick | 7a | Apr 11 | Oct 30 |
| West Warwick | 6b | Apr 22 | Oct 20 |
| Westerly | 7a | Apr 11 | Oct 31 |
| Woonsocket | 6b | Apr 22 | Oct 19 |
Cities with 10,000+ residents. Data: USDA Plant Hardiness Zone Map 2023 and NOAA Climate Normals 1991–2020. Sources and method.