Morristown, TN 37815 Frost Dates
When can you plant in Morristown, TN?
Around 03/31 is the usual last spring frost, about 215 days away. The first fall frost typically arrives around 11/04, about 217 frost-free days later.
The USDA Plant Hardiness Zone Map puts Morristown 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 Morristown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Morristown's last frost
03/31 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Morristown compares
At roughly 217 frost-free days, Morristown places 13,414 of 40,283 ZIP codes in this dataset. Within TN, it ranks 176 of 770.
Learn more
local microclimates covers what one yard in Morristown can differ from the 37815 normal. zone vs. frost date covers why Zone 7b and Morristown's frost date answer different questions.