De Kalb, TX 75559 Frost Dates
75559, near De Kalb, TX: the frost window
Around 03/20 is the usual last spring frost, about 204 days away. Fall's first freeze usually shows up around 11/10, roughly 233 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 De Kalb, not a forecast for this year.
Stretching the season past the first frost
De Kalb'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 03/20 isn't a guarantee
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/11 and only about 1 year in 10 sees frost after that.
De Kalb against the rest of the dataset
De Kalb's growing season runs about 233 days, ranking 9,926 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 2,100 of 2,558.
Learn more
Two guides worth reading on 75559: zone vs. frost date, on why Zone 8b and De Kalb's frost date answer different questions, and the frost range, on how to read the range around De Kalb's dates instead of trusting one.