Saint Charles, AR frost dates
Last spring frostMar 17median date
First fall frostNov 10median date
Growing season238 daysfrost-free
Hardiness zone8bZone 8b
How Saint Charles compares
- In 8 years out of 10, the last spring frost in Saint Charles falls between February 28 and April 5, a 36-day window. The first fall frost falls between October 27 and December 1.
- The median last frost is 11 days earlier than the Arkansas median of Mar 28.
- Its 238-day growing season is longer than 80% of the 603 Arkansas places with a regular frost season (state median 222 days).
- The last frost is typical for zone 8b, where the median is Mar 16.
- The weather station records an average of 54 nights a year at or below 32°F.
- Compared with North Little Rock, AR, 113 km away, the last frost here is 1 day later than there and the growing season is 7 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 28 |
| 50% (median) | March 17 |
| 10% (safe for tender plants) | April 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 27 |
| 50% (median) | November 10 |
| 90% (late) | December 1 |
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 Saint Charles, AR
Saint Charles, AR frost dates — last frost Mar 17, first frost Nov 10, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 23 to Jan 6Start indoors: Dec 23 to Jan 6Transplant outside: Feb 17 to Mar 3
Start indoors: Jan 6 to Jan 20Transplant outside: Mar 31 to Apr 14
Start indoors: Jan 6 to Jan 20Transplant outside: Mar 31 to Apr 14
Start indoors: Jan 20 to Feb 3Transplant outside: Mar 24 to Apr 7
Start indoors: Jan 20 to Feb 3Transplant outside: Feb 24 to Mar 10Sow outdoors: Feb 17 to Mar 24Plant for fall: Sep 15 to Oct 13
Start indoors: Jan 20 to Feb 3Transplant outside: Feb 17 to Mar 3Sow outdoors: Feb 17 to Mar 3Plant for fall: Sep 1 to Sep 22
Start indoors: Jan 20 to Feb 3Transplant outside: Mar 3 to Mar 17Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 20 to Feb 3Transplant outside: Feb 24 to Mar 10Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 20 to Feb 3Transplant outside: Mar 3 to Mar 17Plant for fall: Aug 4 to Aug 25
Start indoors: Feb 3 to Feb 17Transplant outside: Apr 7 to Apr 21Sow outdoors: Apr 7 to Apr 21
Start indoors: Feb 3 to Feb 17Transplant outside: Mar 24 to Apr 7
Sow outdoors: Feb 3 to Feb 24Plant for fall: Aug 18 to Sep 8
Sow outdoors: Feb 3 to Feb 24Plant for fall: Sep 15 to Oct 6
Sow outdoors: Feb 10 to Mar 24Plant for fall: Sep 29 to Oct 20
Start indoors: Feb 17 to Feb 24Transplant outside: Mar 31 to Apr 7Sow outdoors: Mar 24 to Apr 7Plant for fall: Aug 25 to Sep 8
Start indoors: Feb 17 to Feb 24Sow outdoors: Mar 24 to Apr 7Plant for fall: Sep 1 to Sep 15
Start indoors: Feb 17 to Feb 24Sow outdoors: Mar 24 to Apr 7
Start indoors: Feb 17 to Feb 24Transplant outside: Mar 31 to Apr 14
Sow outdoors: Feb 24 to Mar 24Plant for fall: Aug 18 to Sep 1
Sow outdoors: Feb 24 to Mar 24Plant for fall: Sep 1 to Sep 15
Sow outdoors: Feb 24 to Mar 17
Sow outdoors: Mar 3 to Mar 31Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 3 to Mar 24Plant for fall: Sep 15 to Oct 6
Sow outdoors: Mar 24 to Apr 14Plant for fall: Aug 25 to Sep 8
Sow outdoors: Mar 24 to Apr 7
Transplant outside: Mar 31 to Apr 21
Plant for fall: Oct 27 to Dec 1
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Saint Charles, AR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 23 – Jan 6 | Feb 17 – Mar 3 | — | — |
| Peppers | Jan 6 – Jan 20 | Mar 31 – Apr 14 | — | — |
| Eggplant | Jan 6 – Jan 20 | Mar 31 – Apr 14 | — | — |
| Tomatoes | Jan 20 – Feb 3 | Mar 24 – Apr 7 | — | — |
| Lettuce | Jan 20 – Feb 3 | Feb 24 – Mar 10 | Feb 17 – Mar 24 | Sep 15 – Oct 13 |
| Kale | Jan 20 – Feb 3 | Feb 17 – Mar 3 | Feb 17 – Mar 3 | Sep 1 – Sep 22 |
| Broccoli | Jan 20 – Feb 3 | Mar 3 – Mar 17 | — | Aug 4 – Aug 25 |
| Cabbage | Jan 20 – Feb 3 | Feb 24 – Mar 10 | — | Aug 4 – Aug 25 |
| Cauliflower | Jan 20 – Feb 3 | Mar 3 – Mar 17 | — | Aug 4 – Aug 25 |
| Okra | Feb 3 – Feb 17 | Apr 7 – Apr 21 | Apr 7 – Apr 21 | — |
| Basil | Feb 3 – Feb 17 | Mar 24 – Apr 7 | — | — |
| Peas | — | — | Feb 3 – Feb 24 | Aug 18 – Sep 8 |
| Spinach | — | — | Feb 3 – Feb 24 | Sep 15 – Oct 6 |
| Radishes | — | — | Feb 10 – Mar 24 | Sep 29 – Oct 20 |
| Cucumbers | Feb 17 – Feb 24 | Mar 31 – Apr 7 | Mar 24 – Apr 7 | Aug 25 – Sep 8 |
| Zucchini & Summer Squash | Feb 17 – Feb 24 | — | Mar 24 – Apr 7 | Sep 1 – Sep 15 |
| Winter Squash & Pumpkins | Feb 17 – Feb 24 | — | Mar 24 – Apr 7 | — |
| Melons & Watermelon | Feb 17 – Feb 24 | Mar 31 – Apr 14 | — | — |
| Carrots | — | — | Feb 24 – Mar 24 | Aug 18 – Sep 1 |
| Beets | — | — | Feb 24 – Mar 24 | Sep 1 – Sep 15 |
| Potatoes | — | — | Feb 24 – Mar 17 | — |
| Swiss Chard | — | — | Mar 3 – Mar 31 | Sep 1 – Sep 15 |
| Cilantro | — | — | Mar 3 – Mar 24 | Sep 15 – Oct 6 |
| Green Beans | — | — | Mar 24 – Apr 14 | Aug 25 – Sep 8 |
| Sweet Corn | — | — | Mar 24 – Apr 7 | — |
| Sweet Potatoes | — | Mar 31 – Apr 21 | — | — |
| Garlic | — | — | — | Oct 27 – Dec 1 |
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 Saint Charles, AR weather station, 3 km away (elevation 200 ft (61 m)).
Frost dates near Saint Charles
- Crocketts Bluff Mar 11 · Nov 17
- Turner Mar 17 · Nov 10
- Ethel Mar 17 · Nov 10
- Lambrook Mar 17 · Nov 10
- Casscoe Mar 11 · Nov 17
- De Witt Mar 17 · Nov 10
- Holly Grove Mar 15 · Nov 11
- Wabash Mar 17 · Nov 10
- Elaine Mar 17 · Nov 10
- Marvell Mar 17 · Nov 10
Frequently asked questions
When is the last frost in Saint Charles, AR?
The median last spring frost in Saint Charles, AR is March 17. There is still about a 10% chance of frost after April 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Saint Charles, AR?
The median first fall frost is November 10, with about a 10% chance of frost before October 27.
How long is the growing season in Saint Charles, AR?
About 238 days between the median last spring frost and first fall frost.
What planting zone is Saint Charles, AR?
Saint Charles, AR is in USDA hardiness zone 8b.