When to plant in Thibodaux, LA
USDA Zone 9bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Thibodaux, Louisiana — all computed from Thibodaux's nearest NOAA weather station.
Thibodaux enjoys a long ~312-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 9b is warm enough that Thibodaux can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Thibodaux is now 14 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
THIBODAUX 4 SE · 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 Thibodaux’s own odds, recorded at THIBODAUX 4 SE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 21 | Feb 27 | Jan 30 | Nov 7 | Nov 29 | Dec 23 |
| 32°F | Mar 7 | Feb 5 | Jan 3 | Nov 19 | Dec 14 | Jan 15 |
| 28°F | Feb 21 | Jan 23 | Dec 24 | Dec 4 | Jan 1 | Feb 1 |
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 Thibodaux, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 37 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.
Thibodaux planting FAQ
When is the last spring frost in Thibodaux, LA?
Thibodaux's average last spring frost falls near February 5 — 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 Thibodaux, LA?
In Thibodaux, the first 32°F freeze of fall lands around December 14 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Thibodaux in?
Thibodaux is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Thibodaux?
There are roughly 312 frost-free days in Thibodaux (a long growing season), running from the average last frost around February 5 to the first fall frost near December 14.
When should I plant tomatoes in Thibodaux?
In Thibodaux, start tomato seeds indoors around December 11–December 25, then transplant seedlings outdoors around February 12 once the danger of frost has passed.
Never miss a window in Thibodaux
An email when it’s time to start seeds, transplant, and sow — timed to Thibodaux’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Bayou Cane · 20 km
- Bayou Blue · 23 km
- Houma · 26 km
- Morgan City · 38 km
- Laplace · 45 km
- Luling · 46 km
- Gonzales · 48 km
- Destrehan · 49 km
Frost dates recorded at THIBODAUX 4 SE, 6 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 Thibodaux, LA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00169013. Retrieved from https://blissgarden.com/louisiana/thibodaux.