Hartman, AR 72840 Frost Dates
72840, near Hartman, AR: the frost window
Typically, the last spring freeze lands around 03/24, roughly 208 days out. Fall's first freeze usually shows up around 11/10, roughly 233 days after the last spring frost.
Hartman sits in USDA Zone 8a (10 to 15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Hartman'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.
How much risk comes with planting early here
03/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Hartman against the rest of the dataset
At roughly 233 frost-free days, Hartman places 9,961 of 40,283 ZIP codes in this dataset. Within AR, it ranks 198 of 687.
Learn more
Two guides worth reading on 72840: zone vs. frost date, on why Zone 8a and Hartman's frost date answer different questions, and the frost range, on how to read the range around Hartman's dates instead of trusting one.