Cottage Grove, TN 38224 Frost Dates
Frost dates for Cottage Grove, TN, ZIP 38224
Around 04/07 is the usual last spring frost, about 222 days away. The first fall frost typically arrives around 10/31, about 206 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cottage Grove 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
Zone 7b around Cottage Grove has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cottage Grove compares
At roughly 206 frost-free days, Cottage Grove places 16,150 of 40,283 ZIP codes in this dataset. Within TN, it ranks 441 of 770.
Learn more
local microclimates explains what one yard in Cottage Grove can differ from the 38224 normal, and zone vs. frost date explains why Zone 7b and Cottage Grove's frost date answer different questions.