Gretna, LA 70058 Frost Dates
Frost dates for Gretna, LA, ZIP 70058
Around 02/01 is the usual last spring frost, about 157 days away. The first fall frost typically arrives around 12/31, about 330 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
Zone 9b around Gretna has about 18 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
02/01 is the middle of 30 years of NOAA records, not a promise. Plant by 01/02 and you're betting against frost in roughly 9 years out of 10. 03/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Gretna compares
At roughly 330 frost-free days, Gretna places 3,007 of 40,283 ZIP codes in this dataset. Within LA, it ranks 46 of 710.
Learn more
zone vs. frost date explains why Zone 9b and Gretna's frost date answer different questions, and the frost range explains how to read the range around Gretna's dates instead of trusting one.