Frost Dates & Planting Calendars in Delaware
Typical last spring frost, first fall frost, and growing-season length for 20 cities in Delaware, based on NOAA 1991–2020 climate normals. Click a city for its full frost-date summary, monthly temperature chart, and 42-crop planting calendar.
| City | Last Spring Frost (typical) | First Fall Frost (typical) | Growing Season | USDA Zone |
|---|---|---|---|---|
| Wilmington | April 7 | November 4 | 209 days | 7b |
| Dover | April 4 | November 4 | 214 days | 7b |
| Newark | April 7 | November 2 | 208 days | 7b |
| Middletown | April 7 | November 2 | 208 days | 7b |
| Bear | April 7 | November 1 | 209 days | 7b |
| Brookside | April 7 | November 2 | 208 days | 7b |
| Glasgow | April 7 | November 2 | 208 days | 7b |
| Hockessin | April 19 | October 26 | 189 days | 7a |
| Smyrna | April 4 | November 4 | 214 days | 7b |
| Pike Creek Valley | April 7 | November 2 | 208 days | 7b |
| Milford | April 11 | October 30 | 200 days | 7b |
| Claymont | March 30 | November 16 | 230 days | 7b |
| North Star | April 7 | November 2 | 208 days | 7a |
| Pike Creek | April 7 | November 2 | 208 days | 7b |
| Wilmington Manor | April 7 | November 1 | 209 days | 7b |
| Seaford | April 11 | October 30 | 200 days | 7b |
| Georgetown | April 4 | November 6 | 217 days | 7b |
| Elsmere | April 7 | November 4 | 209 days | 7b |
| Edgemoor | April 7 | November 4 | 209 days | 7b |
| New Castle | April 7 | November 1 | 209 days | 7b |