Frost dates · USDA zone 10a
Frost dates for Port St. Lucie, FL
Port St. Lucie, FL sees its last 32 °F night of spring around January 23 and its first of fall around January 18 (next year) — a 365-day freeze-free season in a typical year.
Pick a sauce; the Plan Builder runs this station's dates and hands back the calendar, plant count and gear list.
Freeze odds, by date
| Odds | Last spring freeze after | First fall freeze before |
|---|---|---|
| 9 years in 10 | Jan 4 | Feb 9 (next year) |
| Median — 1 year in 2 | Jan 23 | Jan 18 (next year) |
| 1 year in 10 | Feb 10 | Jan 1 (next year) |
The top row is the risky edge: in 9 years of 10 a spring freeze still comes after it, so tender transplants set out then need cover. The bottom row is the cautious date — only 1 year in 10 freezes after it — and the one to plan uncovered tender transplants against. Freeze-free season: 365 days median, at least 347 in 9 years of 10, no freeze at all in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above.
Port St. Lucie planting calendar, 2027
Every row runs from the median last frost (Jan 23) and median first frost (Jan 18) above, using each cultivar's days to maturity. Same engine as the Plan Builder.
| Crop | Start indoors | Transplant / plant | First harvest | Days |
|---|---|---|---|---|
| Hardneck GarlicSiberian (porcelain hardneck) | — | Oct 15prior fall | Jun 12 | 240 from sow |
| Spanish OnionYellow Sweet Spanish (long-day) | Oct 31 | Dec 26 | Apr 15 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Jan 23 | Feb 22 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Jan 9 | Jan 9 | Feb 23 | 45 from sow |
| Genovese BasilGenovese | Dec 26 | Feb 6 | Apr 7 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Nov 28 | Jan 30 | Apr 15 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Nov 14 | Feb 6 | May 12 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Nov 28 | Jan 30 | Apr 15 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Nov 28 | Jan 30 | Apr 20 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Nov 28 | Jan 30 | Apr 20 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Jan 9 | Jan 9 | Mar 20 | 70 from sow |
| TomatilloToma Verde | Dec 12 | Jan 30 | Apr 10 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Dec 12 | Jan 30 | Apr 15 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Dec 12 | Jan 30 | Apr 20 | 80 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost: start that crop indoors on time or cover it in fall.
What sauce can Port St. Lucie grow?
Each sauce, scheduled for a Port St. Lucie container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Port St. Lucie frost questions
When is the last frost in Port St. Lucie, FL?
The median last 32 °F freeze at STUART, FL is January 23: half of years see a later one. One year in ten, a freeze still comes after February 10; nine years in ten, it comes after January 4. Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Port St. Lucie, FL?
The median first 32 °F freeze of fall is January 18 (next year). One year in ten it arrives before January 1 (next year); nine years in ten, before February 9 (next year).
How long is the growing season in Port St. Lucie, FL?
NOAA counts a full 365-day freeze-free season at STUART, FL in a typical year. What limits a sauce garden here is heat: peppers and tomatoes drop flowers in sustained hot nights, so plant to finish before peak summer or after it breaks.
What growing zone is Port St. Lucie, FL?
USDA hardiness zone 10a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 34953. A zone describes the coldest winter night, not when frost ends, so it is the wrong number for a planting calendar — the frost dates on this page are the right one.
When should I plant tomatoes in Port St. Lucie, FL?
Start Roma VF (determinate paste) seeds indoors around Dec 12 and transplant around Jan 30, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Feb 10. First ripe fruit lands around Apr 15.
When should I plant peppers in Port St. Lucie, FL?
Sow jalapeño indoors on a heat mat around Nov 28; transplant no earlier than Jan 30, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around Apr 15.
Nearby in Florida
- Fort Piercelast frost Jan 22
- Jupiterlast frost Jan 26
- Palm Beach Gardenslast frost Jan 21
- West Palm Beachfrost rare
- Royal Palm Beachfrost rare
- Wellingtonfrost rare
All Florida frost dates → · How frost-date math drives a sowing calendar →