Tennessee frost dates: U
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Unicoi | Apr 21 | Oct 23 | 185 d | 7a |
| Union City | Apr 3 | Oct 29 | 209 d | 7b |
| Unionville | Apr 14 | Oct 25 | 194 d | 7b |
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Unicoi | Apr 21 | Oct 23 | 185 d | 7a |
| Union City | Apr 3 | Oct 29 | 209 d | 7b |
| Unionville | Apr 14 | Oct 25 | 194 d | 7b |