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Louisiana frost dates
Across the 18Louisiana weather stations below, the average last spring frost ranges from Jan 30 in New Orleans to Mar 25 in Monroe 26 N. The statewide middle is about Mar 1 for the last spring frost and Nov 24 for the first fall frost. New Orleans has the longest growing season, about 335 days. Hardiness zones in these places: 8b, 9a, 9b.
Frost dates by city
| Place | Zone | Last spring frost | 90% safe after | First fall frost | Frost-free days |
|---|---|---|---|---|---|
| New Orleans | 9b | Jan 30 | Feb 27 | Dec 31 | 335 |
| Salt Point | 9b | Feb 2 | Mar 1 | Dec 26 | 327 |
| Lafayette | 9a | Feb 13 | Mar 10 | Dec 4 | 294 |
| Lake Charles | 9b | Feb 14 | Mar 11 | Dec 7 | 296 |
| New Iberia Acadiana | 9a | Feb 14 | Mar 11 | Dec 5 | 294 |
| New Orleans Alvin Callender Fl | 9b | Feb 18 | Mar 13 | Dec 6 | 291 |
| Lafayette 13 Se | 9a | Feb 19 | Mar 16 | Dec 1 | 285 |
| Baton Rouge Ryan | 9a | Feb 25 | Mar 19 | Nov 26 | 274 |
| Shreveport Dwtn | 8b | Feb 28 | Mar 19 | Nov 24 | 269 |
| Ft Polk Fullerton Lndg Strip | 9a | Mar 1 | Mar 24 | Nov 23 | 267 |
| Alexandria | 9a | Mar 2 | Mar 25 | Nov 17 | 260 |
| Slidell | 9a | Mar 3 | Mar 26 | Nov 21 | 263 |
| Tallulah Vicksburg | 8b | Mar 3 | Mar 20 | Nov 11 | 253 |
| Monroe | 8b | Mar 8 | Mar 25 | Nov 15 | 252 |
| Peason Ridge Range | 9a | Mar 8 | Mar 26 | Nov 18 | 255 |
| Shreveport | 8b | Mar 9 | Mar 29 | Nov 18 | 254 |
| Alexandria Esler | 9a | Mar 16 | Apr 6 | Nov 8 | 237 |
| Monroe 26 N | 8b | Mar 25 | Apr 10 | Nov 5 | 225 |
Dates are the 50% probability of a 32°F freeze (NOAA 1991–2020 normals); "90% safe after" is the date after which a later spring freeze happens in only 1 year in 10.
When to plant in Louisiana
Using the statewide middle dates (last frost Mar 1, first frost Nov 24). Adjust for your town with the table above or the planting calendar.
| Plant | When to plant in Louisiana |
|---|---|
| Tomatoes | Mar 8 – Mar 22 |
| Peas | Jan 18 – Feb 8; fall: Sep 1 – Sep 22 |
| Potatoes | Feb 1 – Feb 22 |
| Green beans | Mar 8 – Mar 22; fall: Sep 8 – Sep 22 |
| Garlic | Nov 24 – Dec 22 |
| Tulips | Nov 10 – Dec 22 |