Princess Anne, MD 21836 Frost Dates
21836, near Princess Anne, MD: the frost window
Around 03/31 is the usual last spring frost, about 215 days away. Fall's first freeze usually shows up around 11/11, roughly 225 days after the last spring frost.
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 Princess Anne, not a forecast for this year.
Stretching the season past the first frost
Princess Anne's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/31 isn't a guarantee
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/13 and only about 1 year in 10 sees frost after that.
Princess Anne against the rest of the dataset
At roughly 225 frost-free days, Princess Anne places 11,412 of 40,283 ZIP codes in this dataset. Within MD, it ranks 111 of 583.
Learn more
Two guides worth reading on 21836: the frost range, on how to read the range around Princess Anne's dates instead of trusting one, and local microclimates, on what one yard in Princess Anne can differ from the 21836 normal.