Mullins, SC 29543 Frost Dates
29543, near Mullins, SC: the frost window
Around 03/22 is the usual last spring frost, about 206 days away. Fall's first freeze usually shows up around 11/11, roughly 234 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mullins in Zone 8b (15 to 20°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
Mullins'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 03/22 isn't a guarantee
03/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 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.
Mullins against the rest of the dataset
At roughly 234 frost-free days, Mullins places 9,739 of 40,283 ZIP codes in this dataset. Within SC, it ranks 273 of 519.
Learn more
Two guides worth reading on 29543: zone vs. frost date, on why Zone 8b and Mullins's frost date answer different questions, and the frost range, on how to read the range around Mullins's dates instead of trusting one.