When to plant in Port St. Lucie, FL
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Port St. Lucie, Florida — is derived from the closest NOAA station with complete climate normals.
Port St. Lucie's growing season is short at roughly -5 days, so succession planting is limited; lean on transplants over direct sowing for anything slow to mature. Port St. Lucie's nearest full-normals station sits about 18 km out, so treat these as a close estimate — local microclimate can nudge your first and last frost. Zone 10a is warm enough that Port St. Lucie can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average first fall frost in Port St. Lucie is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
STUART · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Port St. Lucie’s own odds, recorded at STUART.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 17 | Jan 27 | Jan 3 | Dec 28 | Jan 17 | Feb 9 |
| 32°F | Feb 10 | Jan 23 | Jan 4 | Jan 1 | Jan 18 | Feb 9 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Port St. Lucie, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Port St. Lucie planting FAQ
When is the last spring frost in Port St. Lucie, FL?
Plan for the last spring frost in Port St. Lucie around January 23 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Port St. Lucie, FL?
The first fall frost in Port St. Lucie typically arrives around January 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Port St. Lucie in?
Port St. Lucie is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Port St. Lucie?
There are roughly -5 frost-free days in Port St. Lucie (a short growing season), running from the average last frost around January 23 to the first fall frost near January 18.
When should I plant tomatoes in Port St. Lucie?
In Port St. Lucie, start tomato seeds indoors around November 28–December 12, then transplant seedlings outdoors around January 30 once the danger of frost has passed.
Never miss a window in Port St. Lucie
An email when it’s time to start seeds, transplant, and sow — timed to Port St. Lucie’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Jensen Beach · 15 km
- Palm City · 15 km
- Fort Pierce · 17 km
- Stuart · 17 km
- Port Salerno · 25 km
- Lakewood Park · 29 km
- Hobe Sound · 34 km
- Florida Ridge · 34 km
Frost dates recorded at STUART, 18 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Port St. Lucie, FL — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00088620. Retrieved from https://blissgarden.com/florida/port-st-lucie.