Frost Dates for Newark, DE
In Newark, DE, the average last spring frost is around Apr 7 and the average first fall frost around Nov 2, for a growing season of about 208 days. For frost-tender plants, wait until Apr 21, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Newark Ag Farm, DE weather station, under 1 mile away, elevation 106 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Apr 21 | Oct 19 |
| 20% | Apr 18 | Oct 24 |
| 30% | Apr 14 | Oct 28 |
| 40% | Apr 10 | Nov 1 |
| 50% | Apr 7 | Nov 2 |
| 60% | Apr 5 | Nov 5 |
| 70% | Apr 3 | Nov 7 |
| 80% | Mar 31 | Nov 11 |
| 90% | Mar 26 | Nov 17 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Apr 22 | Oct 22 |
| Frost / freeze (32°F) | Apr 7 | Nov 2 |
| Hard freeze (28°F) | Mar 27 | Nov 13 |
Planting calendar for Newark
Transplant Apr 14 – Apr 28
Transplant Apr 21 – May 5
Transplant Apr 21 – May 5
Transplant Apr 14 – Apr 28
Sow or transplant Apr 14 – Apr 28
Sow or transplant Apr 14 – Apr 28
Sow or transplant Apr 21 – May 5
Sow or transplant Mar 10 – Mar 24
Fall sowing Sep 7 – Oct 5
Fall sowing Sep 7 – Sep 28
Fall sowing Aug 24 – Sep 7
Sow or transplant Mar 10 – Mar 24
Fall sowing Aug 24 – Sep 21
Transplant Mar 24 – Apr 7
Fall sowing Aug 10 – Aug 24
Transplant Mar 17 – Mar 31
Fall sowing Aug 10 – Aug 24
Fall sowing Aug 10 – Aug 24
Fall sowing Sep 21 – Oct 12
Fall sowing Aug 24 – Sep 7
Plant Mar 10 – Mar 24
Based on the average last frost (Apr 7) and first frost (Nov 2). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.