Thibodaux 4 SE, LA Frost Dates & Growing Season

The two dates every Thibodaux 4 SE garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Feb 5
~50% chance of frost after
First fall frost
Dec 14
~50% chance of frost before
Growing season
312 days
frost-free stretch
USDA zone
≈ 9b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jan 3 Feb 5 Mar 7
First fall frost Jan 15 Dec 14 Nov 19
Hard freeze (28°F), median last Jan 23 · first Jan 1

Computed from NOAA 1991–2020 climate normals at the THIBODAUX 4 SE station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Thibodaux 4 SE

Computed from Thibodaux 4 SE's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Dec 11 – Dec 25 Feb 12 – Feb 19
🫑 Peppers Nov 27 – Dec 11 Feb 19 – Feb 26
🥬 Lettuce Dec 25 – Jan 8 Jan 8 – Jan 22 Jan 8 – Feb 5
🫛 Peas Dec 25 – Jan 8
🥕 Carrots Jan 15 – Feb 5
🥦 Broccoli Dec 18 – Jan 1 Jan 15 – Jan 29
🥬 Kale Dec 25 – Jan 8 Jan 8 – Jan 22 Jan 8 – Jan 22
🥒 Cucumbers Jan 8 – Jan 15 Feb 12 – Feb 19 Feb 12 – Feb 19
🥒 Zucchini Jan 8 – Jan 15 Feb 12 – Feb 19 Feb 12 – Feb 19
🫘 Green Beans (Bush) Feb 12 – Feb 19
🌽 Sweet Corn Feb 12 – Feb 19
🌿 Basil Dec 25 – Jan 8 Feb 12 – Feb 19 Feb 19 – Feb 26
🧄 Garlic Fall: Nov 2 – Nov 30

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Thibodaux 4 SE's dates automatically after a lookup.

Reading the season in Thibodaux 4 SE

With roughly 312 frost-free days, Thibodaux 4 SE gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Dec 14 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Thibodaux 4 SE, LA?

The average last spring frost in Thibodaux 4 SE is around Feb 5, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Thibodaux 4 SE, LA?

The average first fall frost in Thibodaux 4 SE arrives around Dec 14. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Thibodaux 4 SE?

About 312 frost-free days on average, from Feb 5 to Dec 14. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Thibodaux 4 SE in?

USDA zone 9b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.