Maryland frost dates: P
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Park Hall | Mar 30 | Nov 14 | 229 d | 8a |
| Parkton | Apr 19 | Oct 25 | 189 d | 7a |
| Parkville | Apr 2 | Nov 7 | 219 d | 7b |
| Parsonsburg | Apr 10 | Oct 30 | 203 d | 7b |
| Pasadena | Mar 27 | Nov 13 | 231 d | 8a |
| Patuxent River | Mar 29 | Nov 15 | 231 d | 8a |
| Perry Hall | Apr 2 | Nov 7 | 219 d | 7b |
| Perry Point | Apr 10 | Oct 30 | 203 d | 7b |
| Perryman | Apr 10 | Oct 30 | 203 d | 7b |
| Perryville | Apr 10 | Oct 30 | 203 d | 7b |
| Phoenix | Apr 2 | Nov 7 | 219 d | 7b |
| Pikesville | Apr 2 | Nov 7 | 219 d | 7b |
| Piney Point | Mar 30 | Nov 14 | 229 d | 8a |
| Pinto | Apr 15 | Oct 24 | 192 d | 7a |
| Pittsville | Apr 10 | Oct 30 | 203 d | 7b |
| Pocomoke City | Mar 31 | Nov 11 | 225 d | 7b |
| Point Of Rocks | Apr 2 | Nov 6 | 218 d | 7a |
| Pomfret | Apr 3 | Nov 8 | 219 d | 7b |
| Poolesville | Apr 13 | Oct 26 | 196 d | 7b |
| Port Deposit | Apr 3 | Nov 6 | 217 d | 7a |
| Port Republic | Apr 17 | Oct 27 | 193 d | 7b |
| Port Tobacco | Mar 28 | Nov 8 | 225 d | 7b |
| Potomac | Apr 1 | Nov 6 | 219 d | 7b |
| Powellville | Apr 10 | Oct 31 | 204 d | 7b |
| Preston | Apr 1 | Nov 7 | 220 d | 7b |
| Price | Apr 3 | Nov 5 | 216 d | 7b |
| Prince Frederick | Apr 17 | Oct 27 | 193 d | 7b |
| Princess Anne | Apr 3 | Nov 7 | 218 d | 7b |
| Pylesville | Apr 3 | Nov 6 | 217 d | 7a |