Alexandria, VA 22306 Frost Dates
22306, near Alexandria, VA: the frost window
Around 04/03 is the usual last spring frost, about 218 days away. Fall's first freeze usually shows up around 11/08, roughly 217 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Alexandria in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Alexandria's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Alexandria's last frost
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Alexandria against the rest of the dataset
At roughly 217 frost-free days, Alexandria places 13,389 of 40,283 ZIP codes in this dataset. Within VA, it ranks 298 of 1,178.
Learn more
Two guides worth reading on 22306: local microclimates, on what one yard in Alexandria can differ from the 22306 normal, and zone vs. frost date, on why Zone 7b and Alexandria's frost date answer different questions.