Heidelberg, MS 39366 Frost Dates
When can you plant in Heidelberg, MS?
Around 03/14 is the usual last spring frost, about 198 days away. The first fall frost typically arrives around 11/16, about 247 frost-free days later.
The USDA Plant Hardiness Zone Map puts Heidelberg in Zone 8b (15 to 20°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 11 weeks of growing season left in Heidelberg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/14 isn't a guarantee
03/14 is the middle of 30 years of NOAA records, not a promise. Plant by 02/21 and you're betting against frost in roughly 9 years out of 10. 04/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Heidelberg compares
At roughly 247 frost-free days, Heidelberg places 7,867 of 40,283 ZIP codes in this dataset. Within MS, it ranks 159 of 523.
Learn more
zone vs. frost date covers why Zone 8b and Heidelberg's frost date answer different questions. the frost range covers how to read the range around Heidelberg's dates instead of trusting one.