When to plant in St. Petersburg, FL
USDA Zone 10bSt. Petersburg, Florida frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
A ~-2-day frost-free window makes St. Petersburg a short-season garden: choose early varieties and start long-season crops indoors well ahead of the last frost. In zone 10b, frost is a minor factor for St. Petersburg — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
ST PETERSBURG · 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 St. Petersburg’s own odds, recorded at ST PETERSBURG.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 14 | Jan 22 | Dec 28 | Dec 20 | Jan 13 | Feb 8 |
| 32°F | Feb 5 | Jan 17 | Dec 31 | Dec 23 | Jan 15 | Feb 5 |
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 St. Petersburg, 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.
St. Petersburg planting FAQ
When is the last spring frost in St. Petersburg, FL?
Plan for the last spring frost in St. Petersburg around January 17 (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 St. Petersburg, FL?
The first fall frost in St. Petersburg typically arrives around January 15 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is St. Petersburg in?
St. Petersburg is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in St. Petersburg?
St. Petersburg has about -2 frost-free days — a short growing season — between the average last spring frost (January 17) and first fall frost (January 15).
When should I plant tomatoes in St. Petersburg?
For St. Petersburg, sow tomatoes indoors about November 22–December 6 and move the seedlings out around January 24, after the last spring frost.
Never miss a window in St. Petersburg
An email when it’s time to start seeds, transplant, and sow — timed to St. Petersburg’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Gulfport · 7 km
- Lealman · 7 km
- West Lealman · 11 km
- Pinellas Park · 12 km
- Bardmoor · 15 km
- Seminole · 16 km
- Largo · 21 km
- Ruskin · 23 km
Frost dates recorded at ST PETERSBURG, 2 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 St. Petersburg, FL — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00087886. Retrieved from https://blissgarden.com/florida/st-petersburg.