Hebron, MD 21856 Frost Dates
21856, near Hebron, MD: the frost window
The last spring frost here typically falls around 04/08, about 223 days from today. Fall's first freeze usually shows up around 11/04, roughly 209 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hebron in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Hebron's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Hebron's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Hebron against the rest of the dataset
About 209 days separate Hebron's last and first frost, putting it 15,322 of 40,283 ZIP codes nationally. Within MD, it ranks 345 of 583.
Learn more
Two guides worth reading on 21856: zone vs. frost date, on why Zone 7b and Hebron's frost date answer different questions, and the frost range, on how to read the range around Hebron's dates instead of trusting one.