Keedysville, MD 21756 Frost Dates
21756, near Keedysville, MD: the frost window
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/18, roughly 175 days after the last spring frost.
Zone 7a (0 to 5°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 Keedysville, not a forecast for this year.
Stretching the season past the first frost
Keedysville's growing season runs out in roughly 7 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 Keedysville's last frost
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Keedysville against the rest of the dataset
Keedysville's growing season runs about 175 days, ranking 27,062 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 560 of 583.
Learn more
Two guides worth reading on 21756: the frost range, on how to read the range around Keedysville's dates instead of trusting one, and local microclimates, on what one yard in Keedysville can differ from the 21756 normal.