Delaware City, DE 19895 Frost Dates
When can you plant in Delaware City, DE?
Typically, the last spring freeze lands around 04/07, roughly 222 days out. The first fall frost typically arrives around 11/01, about 209 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Delaware City, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Delaware City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/26 and you're betting against frost in roughly 9 years out of 10. 04/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Delaware City compares
Delaware City's growing season runs about 209 days, ranking 15,286 of 40,283 US ZIP codes measured here, longest to shortest. Within DE, it ranks 72 of 96.
Learn more
zone vs. frost date covers why Zone 7b and Delaware City's frost date answer different questions. the frost range covers how to read the range around Delaware City's dates instead of trusting one.