Landisburg, PA 17047 Frost Dates
17047, near Landisburg, PA: the frost window
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/24, roughly 185 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Landisburg in Zone 7a (0 to 5°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
Landisburg's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Landisburg against the rest of the dataset
Landisburg's growing season runs about 185 days, ranking 23,337 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 741 of 2,088.
Learn more
Two guides worth reading on 17047: the frost range, on how to read the range around Landisburg's dates instead of trusting one, and local microclimates, on what one yard in Landisburg can differ from the 17047 normal.