Bluffton, SC 29909 Frost Dates
29909, near Bluffton, SC: the frost window
Around 03/03 is the usual last spring frost, about 187 days away. Fall's first freeze usually shows up around 12/09, roughly 282 days after the last spring frost.
Zone 9a (20 to 25°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 Bluffton, not a forecast for this year.
Stretching the season past the first frost
Bluffton's growing season runs out in roughly 15 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/03 isn't a guarantee
03/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/20 and only about 1 year in 10 sees frost after that.
Bluffton against the rest of the dataset
Bluffton's growing season runs about 282 days, ranking 4,769 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 16 of 519.
Learn more
Two guides worth reading on 29909: the frost range, on how to read the range around Bluffton's dates instead of trusting one, and local microclimates, on what one yard in Bluffton can differ from the 29909 normal.