Hartsville, SC 29550 Frost Dates
Hartsville, SC: when does the frost end?
Typically, the last spring freeze lands around 03/30, roughly 214 days out. Fall's first freeze usually shows up around 11/06, roughly 221 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hartsville 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
With roughly 10 weeks until Hartsville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/13 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.
Hartsville against the rest of the dataset
Hartsville's growing season runs about 221 days, ranking 12,490 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 419 of 519.
Learn more
Before leaning on 29550's figures: local microclimates explains what one yard in Hartsville can differ from the 29550 normal, while zone vs. frost date explains why Zone 8b and Hartsville's frost date answer different questions.