Puryear, TN 38251 Frost Dates
38251, near Puryear, TN: the frost window
Typically, the last spring freeze lands around 04/07, roughly 222 days out. Fall's first freeze usually shows up around 10/31, roughly 206 days after the last spring frost.
Zone 7b (5 to 10°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 Puryear, not a forecast for this year.
Stretching the season past the first frost
Puryear's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Puryear against the rest of the dataset
At roughly 206 frost-free days, Puryear places 16,083 of 40,283 ZIP codes in this dataset. Within TN, it ranks 432 of 770.
Learn more
Two guides worth reading on 38251: local microclimates, on what one yard in Puryear can differ from the 38251 normal, and zone vs. frost date, on why Zone 7b and Puryear's frost date answer different questions.