Maryland frost dates: N
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Nanjemoy | Mar 28 | Nov 8 | 225 d | 7b |
| Nanticoke | Apr 8 | Nov 4 | 210 d | 8a |
| Neavitt | Apr 1 | Nov 7 | 220 d | 8a |
| New Market | Apr 2 | Nov 6 | 218 d | 7a |
| New Midway | Apr 22 | Oct 20 | 181 d | 7a |
| New Windsor | Apr 22 | Oct 20 | 181 d | 7a |
| Newark | Apr 10 | Oct 31 | 204 d | 7b |
| Newburg | Apr 17 | Oct 27 | 193 d | 7b |
| Newcomb | Apr 1 | Nov 7 | 220 d | 8a |
| North Beach | Apr 9 | Oct 29 | 203 d | 8a |
| North East | Apr 7 | Nov 2 | 209 d | 7b |
| Nottingham | Apr 2 | Nov 7 | 219 d | 7b |