Lebanon, OK frost dates
Last spring frostMar 24median date
First fall frostNov 6median date
Growing season227 daysfrost-free
Hardiness zone8aZone 8a
How Lebanon compares
- In 8 years out of 10, the last spring frost in Lebanon falls between March 4 and April 17, a 44-day window. The first fall frost falls between October 21 and November 25.
- The median last frost is 11 days earlier than the Oklahoma median of Apr 4.
- Its 227-day growing season is longer than 90% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is 5 days earlier than the zone 8a median of Mar 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8a chart.
- The weather station records an average of 59 nights a year at or below 32°F.
- Compared with Celina, TX, 74 km away, the last frost here is 7 days later than there and the growing season is 16 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 4 |
| 50% (median) | March 24 |
| 10% (safe for tender plants) | April 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 21 |
| 50% (median) | November 6 |
| 90% (late) | November 25 |
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 Lebanon, OK
Lebanon, OK frost dates — last frost Mar 24, first frost Nov 6, zone 8a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Feb 24 to Mar 10
Start indoors: Jan 13 to Jan 27Transplant outside: Apr 7 to Apr 21
Start indoors: Jan 13 to Jan 27Transplant outside: Apr 7 to Apr 21
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 31 to Apr 14
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 3 to Mar 17Sow outdoors: Feb 24 to Mar 31Plant for fall: Sep 11 to Oct 9
Start indoors: Jan 27 to Feb 10Transplant outside: Feb 24 to Mar 10Sow outdoors: Feb 24 to Mar 10Plant for fall: Aug 28 to Sep 18
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 10 to Mar 24Plant for fall: Jul 31 to Aug 21
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 3 to Mar 17Plant for fall: Jul 31 to Aug 21
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 10 to Mar 24Plant for fall: Jul 31 to Aug 21
Start indoors: Feb 10 to Feb 24Transplant outside: Apr 14 to Apr 28Sow outdoors: Apr 14 to Apr 28
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 31 to Apr 14
Sow outdoors: Feb 10 to Mar 3Plant for fall: Aug 14 to Sep 4
Sow outdoors: Feb 10 to Mar 3Plant for fall: Sep 11 to Oct 2
Sow outdoors: Feb 17 to Mar 31Plant for fall: Sep 25 to Oct 16
Start indoors: Feb 24 to Mar 3Transplant outside: Apr 7 to Apr 14Sow outdoors: Mar 31 to Apr 14Plant for fall: Aug 21 to Sep 4
Start indoors: Feb 24 to Mar 3Sow outdoors: Mar 31 to Apr 14Plant for fall: Aug 28 to Sep 11
Start indoors: Feb 24 to Mar 3Sow outdoors: Mar 31 to Apr 14
Start indoors: Feb 24 to Mar 3Transplant outside: Apr 7 to Apr 21
Sow outdoors: Mar 3 to Mar 31Plant for fall: Aug 14 to Aug 28
Sow outdoors: Mar 3 to Mar 31Plant for fall: Aug 28 to Sep 11
Sow outdoors: Mar 3 to Mar 24
Sow outdoors: Mar 10 to Apr 7Plant for fall: Aug 28 to Sep 11
Sow outdoors: Mar 10 to Mar 31Plant for fall: Sep 11 to Oct 2
Sow outdoors: Mar 31 to Apr 21Plant for fall: Aug 21 to Sep 4
Sow outdoors: Mar 31 to Apr 14
Transplant outside: Apr 7 to Apr 28
Plant for fall: Oct 23 to Nov 27
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Lebanon, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 30 – Jan 13 | Feb 24 – Mar 10 | — | — |
| Peppers | Jan 13 – Jan 27 | Apr 7 – Apr 21 | — | — |
| Eggplant | Jan 13 – Jan 27 | Apr 7 – Apr 21 | — | — |
| Tomatoes | Jan 27 – Feb 10 | Mar 31 – Apr 14 | — | — |
| Lettuce | Jan 27 – Feb 10 | Mar 3 – Mar 17 | Feb 24 – Mar 31 | Sep 11 – Oct 9 |
| Kale | Jan 27 – Feb 10 | Feb 24 – Mar 10 | Feb 24 – Mar 10 | Aug 28 – Sep 18 |
| Broccoli | Jan 27 – Feb 10 | Mar 10 – Mar 24 | — | Jul 31 – Aug 21 |
| Cabbage | Jan 27 – Feb 10 | Mar 3 – Mar 17 | — | Jul 31 – Aug 21 |
| Cauliflower | Jan 27 – Feb 10 | Mar 10 – Mar 24 | — | Jul 31 – Aug 21 |
| Okra | Feb 10 – Feb 24 | Apr 14 – Apr 28 | Apr 14 – Apr 28 | — |
| Basil | Feb 10 – Feb 24 | Mar 31 – Apr 14 | — | — |
| Peas | — | — | Feb 10 – Mar 3 | Aug 14 – Sep 4 |
| Spinach | — | — | Feb 10 – Mar 3 | Sep 11 – Oct 2 |
| Radishes | — | — | Feb 17 – Mar 31 | Sep 25 – Oct 16 |
| Cucumbers | Feb 24 – Mar 3 | Apr 7 – Apr 14 | Mar 31 – Apr 14 | Aug 21 – Sep 4 |
| Zucchini & Summer Squash | Feb 24 – Mar 3 | — | Mar 31 – Apr 14 | Aug 28 – Sep 11 |
| Winter Squash & Pumpkins | Feb 24 – Mar 3 | — | Mar 31 – Apr 14 | — |
| Melons & Watermelon | Feb 24 – Mar 3 | Apr 7 – Apr 21 | — | — |
| Carrots | — | — | Mar 3 – Mar 31 | Aug 14 – Aug 28 |
| Beets | — | — | Mar 3 – Mar 31 | Aug 28 – Sep 11 |
| Potatoes | — | — | Mar 3 – Mar 24 | — |
| Swiss Chard | — | — | Mar 10 – Apr 7 | Aug 28 – Sep 11 |
| Cilantro | — | — | Mar 10 – Mar 31 | Sep 11 – Oct 2 |
| Green Beans | — | — | Mar 31 – Apr 21 | Aug 21 – Sep 4 |
| Sweet Corn | — | — | Mar 31 – Apr 14 | — |
| Sweet Potatoes | — | Apr 7 – Apr 28 | — | — |
| Garlic | — | — | — | Oct 23 – Nov 27 |
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 Madill 11wsw Mesonet, OK weather station, 8 km away (elevation 761 ft (232 m)).
Frost dates near Lebanon
- Kingston Mar 27 · Nov 8
- Madill Mar 27 · Nov 8
- Marietta Apr 6 · Nov 2
- Overbrook Mar 15 · Nov 14
- Mannsville Mar 27 · Nov 8
- Thackerville Apr 6 · Nov 2
- Cartwright Mar 14 · Nov 19
- Ravia Mar 29 · Nov 5
- Mead Mar 31 · Nov 5
- Platter Mar 31 · Nov 5
Frequently asked questions
When is the last frost in Lebanon, OK?
The median last spring frost in Lebanon, OK is March 24. There is still about a 10% chance of frost after April 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Lebanon, OK?
The median first fall frost is November 6, with about a 10% chance of frost before October 21.
How long is the growing season in Lebanon, OK?
About 227 days between the median last spring frost and first fall frost.
What planting zone is Lebanon, OK?
Lebanon, OK is in USDA hardiness zone 8a.