Bossier City, LA 71171 Frost Dates
71171, near Bossier City, LA: the frost window
Around 03/14 is the usual last spring frost, about 198 days away. Fall's first freeze usually shows up around 11/14, roughly 246 days after the last spring frost.
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 Bossier City, not a forecast for this year.
Stretching the season past the first frost
Bossier City's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/14 isn't a guarantee
03/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/01 and only about 1 year in 10 sees frost after that.
Bossier City against the rest of the dataset
At roughly 246 frost-free days, Bossier City places 7,907 of 40,283 ZIP codes in this dataset. Within LA, it ranks 616 of 710.
Learn more
Two guides worth reading on 71171: zone vs. frost date, on why Zone 8b and Bossier City's frost date answer different questions, and the frost range, on how to read the range around Bossier City's dates instead of trusting one.