Morton, MS 39117 Frost Dates
When can you plant in Morton, MS?
Around 03/28 is the usual last spring frost, about 212 days away. The first fall frost typically arrives around 11/03, about 221 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Morton, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Morton 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
03/28 is the middle of 30 years of NOAA records, not a promise. Plant by 03/06 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Morton compares
About 221 days separate Morton's last and first frost, putting it 12,511 of 40,283 ZIP codes nationally. Within MS, it ranks 442 of 523.
Learn more
the frost range covers how to read the range around Morton's dates instead of trusting one. local microclimates covers what one yard in Morton can differ from the 39117 normal.