Maryland frost dates: D
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Damascus | Apr 14 | Oct 29 | 198 d | 7b |
| Dameron | Mar 30 | Nov 14 | 229 d | 8a |
| Darlington | Apr 3 | Nov 6 | 217 d | 7a |
| Davidsonville | Mar 27 | Nov 13 | 231 d | 7b |
| Dayton | Apr 5 | Nov 9 | 218 d | 7b |
| Deal Island | Apr 8 | Nov 4 | 210 d | 8a |
| Deale | Apr 9 | Oct 29 | 203 d | 8a |
| Delmar | Apr 2 | Nov 10 | 222 d | 7b |
| Denton | Apr 11 | Oct 30 | 202 d | 7b |
| Derwood | Apr 1 | Nov 6 | 219 d | 7b |
| Dhs | Apr 3 | Nov 8 | 219 d | 7b |
| Dickerson | Apr 14 | Oct 29 | 198 d | 7b |
| District Heights | Apr 9 | Oct 29 | 203 d | 7b |
| Dowell | Mar 22 | Nov 26 | 249 d | 8a |
| Drayden | Mar 30 | Nov 14 | 229 d | 8a |
| Dundalk | Mar 24 | Nov 21 | 242 d | 8a |
| Dunkirk | Apr 9 | Oct 29 | 203 d | 7b |