When to plant in St. Augustine, FL
USDA Zone 9bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for St. Augustine, Florida — all computed from St. Augustine's nearest NOAA weather station.
St. Augustine's growing season is short at roughly -27 days, so succession planting is limited; lean on transplants over direct sowing for anything slow to mature. In zone 9b, frost is a minor factor for St. Augustine — most perennials thrive, and annual vegetables can go out early and stay late.
The average first fall frost in St. Augustine is now 10 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
ST AUGUSTINE LIGHTHOUSE · 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. Augustine’s own odds, recorded at ST AUGUSTINE LIGHTHOUSE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 13 | Feb 17 | Jan 14 | Nov 27 | Dec 20 | Jan 20 |
| 32°F | Mar 3 | Feb 1 | Dec 31 | Dec 7 | Jan 5 | Feb 10 |
| 28°F | Feb 22 | Jan 25 | Dec 26 | Dec 16 | Jan 10 | Feb 13 |
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. Augustine, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 27 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. Augustine planting FAQ
When is the last spring frost in St. Augustine, FL?
St. Augustine's average last spring frost falls near February 1 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in St. Augustine, FL?
Expect St. Augustine's first fall frost near January 5 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is St. Augustine in?
St. Augustine is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in St. Augustine?
St. Augustine has about -27 frost-free days — a short growing season — between the average last spring frost (February 1) and first fall frost (January 5).
When should I plant tomatoes in St. Augustine?
For St. Augustine, sow tomatoes indoors about December 7–December 21 and move the seedlings out around February 8, after the last spring frost.
Never miss a window in St. Augustine
An email when it’s time to start seeds, transplant, and sow — timed to St. Augustine’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- World Golf Village · 19 km
- Nocatee · 23 km
- Palm Valley · 35 km
- Green Cove Springs · 37 km
- Fruit Cove · 37 km
- Palm Coast · 40 km
- Jacksonville Beach · 42 km
- Palatka · 44 km
Frost dates recorded at ST AUGUSTINE LIGHTHOUSE, 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. Augustine, FL — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00087826. Retrieved from https://blissgarden.com/florida/st-augustine.