Port St. Lucie, FL 34984 Frost Dates
When can you plant in Port St. Lucie, FL?
Around 01/23 is the usual last spring frost, about 148 days away. The first fall frost typically arrives around 01/18, about 365 frost-free days later.
Port St. Lucie sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 20 weeks of growing season left in Port St. Lucie before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Port St. Lucie's last frost
01/23 is the middle of 30 years of NOAA records, not a promise. Plant by 01/04 and you're betting against frost in roughly 9 years out of 10. 02/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port St. Lucie compares
Port St. Lucie's growing season runs about 365 days, ranking 318 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 77 of 1,609.
Learn more
zone vs. frost date covers why Zone 10a and Port St. Lucie's frost date answer different questions. the frost range covers how to read the range around Port St. Lucie's dates instead of trusting one.