Vienna, MD 21865 Frost Dates
When can you plant in Vienna, MD?
The last spring frost here typically falls around 04/08, about 223 days from today. The first fall frost typically arrives around 11/04, about 209 frost-free days later.
The USDA Plant Hardiness Zone Map puts Vienna in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 10 weeks of growing season left in Vienna before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/24 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Vienna compares
About 209 days separate Vienna's last and first frost, putting it 15,417 of 40,283 ZIP codes nationally. Within MD, it ranks 355 of 583.
Learn more
local microclimates covers what one yard in Vienna can differ from the 21865 normal. zone vs. frost date covers why Zone 7b and Vienna's frost date answer different questions.