Marion, SC 29589 Frost Dates
29589, near Marion, 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 Marion 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
Marion'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.
How much risk comes with planting early here
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.
Marion against the rest of the dataset
About 234 days separate Marion's last and first frost, putting it 9,727 of 40,283 ZIP codes nationally. Within SC, it ranks 269 of 519.
Learn more
Two guides worth reading on 29589: local microclimates, on what one yard in Marion can differ from the 29589 normal, and zone vs. frost date, on why Zone 8b and Marion's frost date answer different questions.