Gretna, LA 70116 Frost Dates
Gretna, LA: when does the frost end?
Typically, the last spring freeze lands around 02/01, roughly 157 days out. Fall's first freeze usually shows up around 12/31, roughly 330 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 18 weeks until Gretna's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/01 isn't a guarantee
02/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/06 and only about 1 year in 10 sees frost after that.
Gretna against the rest of the dataset
At roughly 330 frost-free days, Gretna places 3,010 of 40,283 ZIP codes in this dataset. Within LA, it ranks 49 of 710.
Learn more
Before leaning on 70116's figures: zone vs. frost date explains why Zone 9b and Gretna's frost date answer different questions, while the frost range explains how to read the range around Gretna's dates instead of trusting one.