Gretna, LA 70131 Frost Dates
When can you plant in Gretna, LA?
Around 02/10 is the usual last spring frost, about 166 days away. The first fall frost typically arrives around 12/17, about 309 frost-free days later.
The USDA Plant Hardiness Zone Map puts Gretna in Zone 9b (25 to 30°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 16 weeks of growing season left in Gretna before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Gretna's last frost
02/10 is the middle of 30 years of NOAA records, not a promise. Plant by 01/12 and you're betting against frost in roughly 9 years out of 10. 03/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Gretna compares
About 309 days separate Gretna's last and first frost, putting it 3,645 of 40,283 ZIP codes nationally. Within LA, it ranks 128 of 710.
Learn more
local microclimates covers what one yard in Gretna can differ from the 70131 normal. zone vs. frost date covers why Zone 9b and Gretna's frost date answer different questions.