Simpson, LA frost dates
Last spring frostMar 1median date
First fall frostNov 23median date
Growing season267 daysfrost-free
Hardiness zone9aZone 9a
How Simpson compares
- In 8 years out of 10, the last spring frost in Simpson falls between January 31 and March 24, a 52-day window. The first fall frost falls between November 4 and December 20.
- The median last frost is 2 days earlier than the Louisiana median of Mar 3.
- Its 267-day growing season is longer than 52% of the 388 Louisiana places with a regular frost season (state median 266 days).
- The last frost is typical for zone 9a, where the median is Mar 3.
- The weather station records an average of 25 nights a year at or below 32°F.
- Compared with Lake Charles, LA, 115 km away, the last frost here is 1 day earlier than there and the growing season is 1 day shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 31 |
| 50% (median) | March 1 |
| 10% (safe for tender plants) | March 24 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 4 |
| 50% (median) | November 23 |
| 90% (late) | December 20 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Simpson, LA
Simpson, LA frost dates — last frost Mar 1, first frost Nov 23, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 7 to Dec 21Transplant outside: Feb 1 to Feb 15
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Mar 15 to Mar 29
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Mar 15 to Mar 29
Start indoors: Jan 4 to Jan 18Transplant outside: Mar 8 to Mar 22
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 8 to Feb 22Sow outdoors: Feb 1 to Mar 8Plant for fall: Sep 28 to Oct 26
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 1 to Feb 15Sow outdoors: Feb 1 to Feb 15Plant for fall: Sep 14 to Oct 5
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 15 to Mar 1Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 8 to Feb 22Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 15 to Mar 1Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 22 to Apr 5Sow outdoors: Mar 22 to Apr 5
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 8 to Mar 22
Sow outdoors: Jan 18 to Feb 8Plant for fall: Aug 31 to Sep 21
Sow outdoors: Jan 18 to Feb 8Plant for fall: Sep 28 to Oct 19
Sow outdoors: Jan 25 to Mar 8Plant for fall: Oct 12 to Nov 2
Start indoors: Feb 1 to Feb 8Transplant outside: Mar 15 to Mar 22Sow outdoors: Mar 8 to Mar 22Plant for fall: Sep 7 to Sep 21
Start indoors: Feb 1 to Feb 8Sow outdoors: Mar 8 to Mar 22Plant for fall: Sep 14 to Sep 28
Start indoors: Feb 1 to Feb 8Sow outdoors: Mar 8 to Mar 22
Start indoors: Feb 1 to Feb 8Transplant outside: Mar 15 to Mar 29
Sow outdoors: Feb 8 to Mar 8Plant for fall: Aug 31 to Sep 14
Sow outdoors: Feb 8 to Mar 8Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 8 to Mar 1
Sow outdoors: Feb 15 to Mar 15Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 15 to Mar 8Plant for fall: Sep 28 to Oct 19
Sow outdoors: Mar 8 to Mar 29Plant for fall: Sep 7 to Sep 21
Sow outdoors: Mar 8 to Mar 22
Transplant outside: Mar 15 to Apr 5
Plant for fall: Nov 9 to Dec 14
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Simpson, LA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 7 – Dec 21 | Feb 1 – Feb 15 | — | — |
| Peppers | Dec 21 – Jan 4 | Mar 15 – Mar 29 | — | — |
| Eggplant | Dec 21 – Jan 4 | Mar 15 – Mar 29 | — | — |
| Tomatoes | Jan 4 – Jan 18 | Mar 8 – Mar 22 | — | — |
| Lettuce | Jan 4 – Jan 18 | Feb 8 – Feb 22 | Feb 1 – Mar 8 | Sep 28 – Oct 26 |
| Kale | Jan 4 – Jan 18 | Feb 1 – Feb 15 | Feb 1 – Feb 15 | Sep 14 – Oct 5 |
| Broccoli | Jan 4 – Jan 18 | Feb 15 – Mar 1 | — | Aug 17 – Sep 7 |
| Cabbage | Jan 4 – Jan 18 | Feb 8 – Feb 22 | — | Aug 17 – Sep 7 |
| Cauliflower | Jan 4 – Jan 18 | Feb 15 – Mar 1 | — | Aug 17 – Sep 7 |
| Okra | Jan 18 – Feb 1 | Mar 22 – Apr 5 | Mar 22 – Apr 5 | — |
| Basil | Jan 18 – Feb 1 | Mar 8 – Mar 22 | — | — |
| Peas | — | — | Jan 18 – Feb 8 | Aug 31 – Sep 21 |
| Spinach | — | — | Jan 18 – Feb 8 | Sep 28 – Oct 19 |
| Radishes | — | — | Jan 25 – Mar 8 | Oct 12 – Nov 2 |
| Cucumbers | Feb 1 – Feb 8 | Mar 15 – Mar 22 | Mar 8 – Mar 22 | Sep 7 – Sep 21 |
| Zucchini & Summer Squash | Feb 1 – Feb 8 | — | Mar 8 – Mar 22 | Sep 14 – Sep 28 |
| Winter Squash & Pumpkins | Feb 1 – Feb 8 | — | Mar 8 – Mar 22 | — |
| Melons & Watermelon | Feb 1 – Feb 8 | Mar 15 – Mar 29 | — | — |
| Carrots | — | — | Feb 8 – Mar 8 | Aug 31 – Sep 14 |
| Beets | — | — | Feb 8 – Mar 8 | Sep 14 – Sep 28 |
| Potatoes | — | — | Feb 8 – Mar 1 | — |
| Swiss Chard | — | — | Feb 15 – Mar 15 | Sep 14 – Sep 28 |
| Cilantro | — | — | Feb 15 – Mar 8 | Sep 28 – Oct 19 |
| Green Beans | — | — | Mar 8 – Mar 29 | Sep 7 – Sep 21 |
| Sweet Corn | — | — | Mar 8 – Mar 22 | — |
| Sweet Potatoes | — | Mar 15 – Apr 5 | — | — |
| Garlic | — | — | — | Nov 9 – Dec 14 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Ft Polk Fullerton Lndg Strip, LA weather station, 13 km away (elevation 312 ft (95 m)).
Frost dates near Simpson
- Slagle Mar 20 · Nov 9
- Mora Mar 2 · Nov 27
- Kurthwood Mar 8 · Nov 18
- Flatwoods Mar 2 · Nov 27
- Gorum Mar 2 · Nov 27
- Sieper Mar 1 · Nov 23
- Leesville Mar 20 · Nov 9
- Lena Mar 2 · Nov 27
- Otis Mar 2 · Nov 27
- Hineston Mar 1 · Nov 23
Frequently asked questions
When is the last frost in Simpson, LA?
The median last spring frost in Simpson, LA is March 1. There is still about a 10% chance of frost after March 24, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Simpson, LA?
The median first fall frost is November 23, with about a 10% chance of frost before November 4.
How long is the growing season in Simpson, LA?
About 267 days between the median last spring frost and first fall frost.
What planting zone is Simpson, LA?
Simpson, LA is in USDA hardiness zone 9a.