Frost dates · USDA zone 9a
Frost dates for Baton Rouge, LA
Baton Rouge, LA sees its last 32 °F night of spring around February 25 and its first of fall around November 26 — a 276-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 29 | Dec 19 |
| Median — 1 year in 2 | Feb 25 | Nov 26 |
| 1 year in 10 | Mar 19 | Nov 7 |
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: 276 days median, at least 245 in 9 years of 10, at least 311 days in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above. A hard freeze (28 °F) has a median last date of Feb 6 and first of Dec 11.
Baton Rouge planting calendar, 2027
Every row runs from the median last frost (Feb 25) and median first frost (Nov 26) 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) | Dec 3 | Jan 28 | May 18 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Feb 25 | Mar 27 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Feb 11 | Feb 11 | Mar 28 | 45 from sow |
| Genovese BasilGenovese | Jan 28 | Mar 11 | May 10 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Dec 31 | Mar 4 | May 18 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Dec 17 | Mar 11 | Jun 14 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Dec 31 | Mar 4 | May 18 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Dec 31 | Mar 4 | May 23 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Dec 31 | Mar 4 | May 23 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Feb 11 | Feb 11 | Apr 22 | 70 from sow |
| TomatilloToma Verde | Jan 14 | Mar 4 | May 13 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Jan 14 | Mar 4 | May 18 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Jan 14 | Mar 4 | May 23 | 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 Baton Rouge grow?
Each sauce, scheduled for a Baton Rouge container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Baton Rouge frost questions
When is the last frost in Baton Rouge, LA?
The median last 32 °F freeze at BATON ROUGE RYAN AP, LA is February 25: half of years see a later one. One year in ten, a freeze still comes after March 19; nine years in ten, it comes after January 29. Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Baton Rouge, LA?
The median first 32 °F freeze of fall is November 26. One year in ten it arrives before November 7; nine years in ten, before December 19.
How long is the growing season in Baton Rouge, LA?
276 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 245 days; one year in ten, at least 311 days.
What growing zone is Baton Rouge, LA?
USDA hardiness zone 9a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 70806. 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 Baton Rouge, LA?
Start Roma VF (determinate paste) seeds indoors around Jan 14 and transplant around Mar 4, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Mar 19. First ripe fruit lands around May 18.
When should I plant peppers in Baton Rouge, LA?
Sow jalapeño indoors on a heat mat around Dec 31; transplant no earlier than Mar 4, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around May 18.
Nearby in Louisiana
- Lafayettelast frost Feb 26
- Kennerlast frost Jan 30
- New Orleanslast frost Jan 22
- Alexandrialast frost Mar 3
- Lake Charleslast frost Feb 14
- Monroelast frost Mar 8
All Louisiana frost dates → · How frost-date math drives a sowing calendar →