Jacksonville, FL 32099 Frost Dates
When can you plant in Jacksonville, FL?
Around 02/28 is the usual last spring frost, about 184 days away. The first fall frost typically arrives around 12/03, about 280 frost-free days later.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Jacksonville, not a forecast for this year.
What to do before the first frost
About 14 weeks of growing season left in Jacksonville 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
02/28 is the middle of 30 years of NOAA records, not a promise. Plant by 01/30 and you're betting against frost in roughly 9 years out of 10. 03/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jacksonville compares
Jacksonville's growing season runs about 280 days, ranking 4,823 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 1,426 of 1,609.
Learn more
local microclimates covers what one yard in Jacksonville can differ from the 32099 normal. zone vs. frost date covers why Zone 9a and Jacksonville's frost date answer different questions.