Flat Rock, NC 28731 Frost Dates
28731, near Flat Rock, NC: the frost window
Around 04/14 is the usual last spring frost, about 229 days away. Fall's first freeze usually shows up around 10/25, roughly 192 days after the last spring frost.
Flat Rock sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Flat Rock'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.
The actual range around Flat Rock's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Flat Rock against the rest of the dataset
Flat Rock's growing season runs about 192 days, ranking 20,310 of 40,283 US ZIP codes measured here, longest to shortest. Within NC, it ranks 958 of 1,078.
Learn more
Two guides worth reading on 28731: local microclimates, on what one yard in Flat Rock can differ from the 28731 normal, and zone vs. frost date, on why Zone 7b and Flat Rock's frost date answer different questions.