Bulverde, TX 78131 Frost Dates
78131, near Bulverde, TX: the frost window
Around 03/01 is the usual last spring frost, about 185 days away. Fall's first freeze usually shows up around 12/01, roughly 276 days after the last spring frost.
Bulverde sits in USDA Zone 9a (20 to 25°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
Bulverde's growing season runs out in roughly 14 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
03/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/22 and only about 1 year in 10 sees frost after that.
Bulverde against the rest of the dataset
Bulverde's growing season runs about 276 days, ranking 5,089 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 831 of 2,558.
Learn more
Two guides worth reading on 78131: zone vs. frost date, on why Zone 9a and Bulverde's frost date answer different questions, and the frost range, on how to read the range around Bulverde's dates instead of trusting one.