Walterboro, SC 29446 Frost Dates
When can you plant in Walterboro, SC?
The last spring frost here typically falls around 02/28, about 184 days from today. The first fall frost typically arrives around 12/03, about 279 frost-free days later.
The USDA Plant Hardiness Zone Map puts Walterboro in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 14 weeks of growing season left in Walterboro before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
02/28 is the middle of 30 years of NOAA records, not a promise. Plant by 02/02 and you're betting against frost in roughly 9 years out of 10. 03/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Walterboro compares
Walterboro's growing season runs about 279 days, ranking 4,894 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 35 of 519.
Learn more
local microclimates covers what one yard in Walterboro can differ from the 29446 normal. zone vs. frost date covers why Zone 9a and Walterboro's frost date answer different questions.