Folsom, LA 70437 Frost Dates
When can you plant in Folsom, LA?
Around 03/12 is the usual last spring frost, about 196 days away. The first fall frost typically arrives around 11/18, about 253 frost-free days later.
Zone 9a (20 to 25°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 Folsom, not a forecast for this year.
What to do before the first frost
About 12 weeks of growing season left in Folsom before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/12 isn't a guarantee
03/12 is the middle of 30 years of NOAA records, not a promise. Plant by 02/13 and you're betting against frost in roughly 9 years out of 10. 04/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Folsom compares
Folsom's growing season runs about 253 days, ranking 7,174 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 581 of 710.
Learn more
local microclimates covers what one yard in Folsom can differ from the 70437 normal. zone vs. frost date covers why Zone 9a and Folsom's frost date answer different questions.