Connecticut planting zones & frost dates
The 7 Connecticut cities on this site fall in zones 6b, 7a. Last spring frost dates range from Apr 9 in Bridgeport to May 6 in Danbury.
| City | Zone | Last frost | First frost | Population |
|---|---|---|---|---|
| Bridgeport | 7a | Apr 9 | Nov 1 | 151,599 |
| Stamford | 7a | Apr 23 | Oct 16 | 139,134 |
| New Haven | 7a | Apr 22 | Oct 20 | 137,562 |
| Hartford | 6b | Apr 23 | Oct 20 | 122,129 |
| Waterbury | 6b | May 1 | Oct 11 | 115,908 |
| Norwalk | 7a | Apr 23 | Oct 16 | 93,661 |
| Danbury | 6b | May 6 | Oct 7 | 88,692 |
Frost dates are 30%-risk dates from the nearest suitable NOAA station. Population: Census Vintage 2024 estimates.