Baton Rouge, LA — USDA Zone 9a

Frost dates and growing season in Baton Rouge

All of Baton Rouge's mapped ZIP codes fall in the same hardiness band, Zone 9a.

These are 50%-probability averages modeled from Baton Rouge's USDA hardiness zone and regional climate normals — not a single-station reading. In a typical year the last spring frost will have passed by February 28, but a colder-than-average year can run 1-2 weeks later. Plant tender crops (tomatoes, peppers, basil) once both soil and night temperatures are consistently warm — a thermometer beats the calendar.

Growing season in Baton Rouge

Baton Rouge, Louisiana sits in USDA Zone 9a, with roughly 267 frost-free days between an average last spring frost around February 28 and a first fall frost around November 22. That is a near year-round season — the limiting factor is summer heat, not frost, so schedule cool-season crops for winter and protect tender ones from extreme highs. Baton Rouge lies near 30.5°N; higher-latitude gardens get longer midsummer days but a tighter shoulder season at this zone.

What grows in Baton Rouge

Baton Rouge falls in USDA Zone 9a, so the same hardiness constraints apply as the full Zone 9 guide. Vegetables, herbs, and fruit trees rated to Zone 9a (or hardier) will overwinter here in a typical year.

• Tomatoes (year-round in many areas)
• Peppers (all year)
• Citrus (oranges, lemons, limes, grapefruit)
• Avocado
• Mango (warmer areas)
• Banana
• Sweet potatoes
• Okra
• Southern peas
• Pomegranates

What to plant in Baton Rouge this week

Baton Rouge is in high summer — most spring plantings are in. Keep an eye on watering and start planning your fall crop. Cool-season seedlings (broccoli, cabbage, lettuce) can be started indoors for a fall transplant.

• When to plant tomatoes in zone 9
• When to plant peppers in zone 9
• When to plant bush beans in zone 9
• When to plant cucumbers in zone 9
• When to plant basil in zone 9

Full planting calendar for Baton Rouge

Crop-by-crop sowing, transplant, and harvest dates calibrated to zone 9 averages:

• When to plant tomatoes in zone 9
• When to plant peppers in zone 9
• When to plant basil in zone 9
• When to plant garlic in zone 9
• When to plant lettuce in zone 9
• When to plant bush beans in zone 9
• When to plant cucumbers in zone 9
• When to plant summer squash in zone 9
• When to plant peas in zone 9
• When to plant carrots in zone 9

ZIP codes in Baton Rouge

Drill down to the precise frost window and planting calendar for a specific ZIP in Baton Rouge:

• 70802 — Baton Rouge (Zone 9a)
• 70808 — Baton Rouge (Southeast) (Zone 9a)
• 70816 — Baton Rouge (East) (Zone 9a)

Local microclimate notes

Zone tables give you the average — but Baton Rougegardens vary. South-facing walls and paved areas can run a full half-zone warmer than the published rating. Low-lying spots, frost pockets, and shaded north sides can run colder. If you've gardened here a few seasons, your own frost record — the last time you actually got frost damage — beats any national average.

Source and methodology

Hardiness zone from the USDA Plant Hardiness Zone Map (2023 revision). Frost-date and growing-season figures are modeled from Baton Rouge's USDA hardiness zone and regional NOAA 1991-2020 climate normals — zone-level estimates, not a per-station record, so treat them as planning guidance and confirm against your own local frost history. Crop recommendations draw on US Cooperative Extension references, curated by the Growli editorial team. Last reviewed June 2026.

Other cities in Louisiana

• Harvey, LA — USDA Zone 9b
• Houma, LA — USDA Zone 9b
• Kenner, LA — USDA Zone 9b
• Lafayette, LA — USDA Zone 9a
• Lake Charles, LA — USDA Zone 9a
• Marrero, LA — USDA Zone 9b
• Monroe, LA — USDA Zone 8b
• New Orleans, LA — USDA Zone 9b
• Shreveport, LA — USDA Zone 8b
• All of Louisiana by zone

Related guides

• USDA Zone 9 — full plant + frost guide
• Browse USDA hardiness zones by city
• Look up a ZIP code
• How to start a vegetable garden — beginner guide