Harleyville, SC 29437 Frost Dates
When can you plant in Harleyville, SC?
Around 03/22 is the usual last spring frost, about 206 days away. The first fall frost typically arrives around 11/12, about 238 frost-free days later.
Harleyville sits in USDA Zone 8b (15 to 20°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.
What to do before the first frost
About 11 weeks of growing season left in Harleyville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/22 isn't a guarantee
03/22 is the middle of 30 years of NOAA records, not a promise. Plant by 03/01 and you're betting against frost in roughly 9 years out of 10. 04/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harleyville compares
Harleyville's growing season runs about 238 days, ranking 9,008 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 228 of 519.
Learn more
zone vs. frost date covers why Zone 8b and Harleyville's frost date answer different questions. the frost range covers how to read the range around Harleyville's dates instead of trusting one.