Frost dates for 73403 — Ardmore, OK
Last spring frostMar 15median date
First fall frostNov 14median date
Growing season244 daysfrost-free
Hardiness zone8aZone 8a
How Ardmore compares
- In 8 years out of 10, the last spring frost in Ardmore falls between February 24 and April 2, a 37-day window. The first fall frost falls between October 29 and December 2.
- The median last frost is 20 days earlier than the Oklahoma median of Apr 4.
- Its 244-day growing season is among the longest of the 582 Oklahoma places with a regular frost season.
- The last frost is 14 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 46 nights a year at or below 32°F.
- Compared with Celina, TX, 102 km away, the last frost here is 2 days earlier than there and the growing season is 1 day longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 24 |
| 50% (median) | March 15 |
| 10% (safe for tender plants) | April 2 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 29 |
| 50% (median) | November 14 |
| 90% (late) | December 2 |
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 Ardmore, OK
Frost dates for 73403 — Ardmore, OK — last frost Mar 15, first frost Nov 14, zone 8a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 15 to Mar 1
Start indoors: Jan 4 to Jan 18Transplant outside: Mar 29 to Apr 12
Start indoors: Jan 4 to Jan 18Transplant outside: Mar 29 to Apr 12
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 22 to Apr 5
Start indoors: Jan 18 to Feb 1Transplant outside: Feb 22 to Mar 8Sow outdoors: Feb 15 to Mar 22Plant for fall: Sep 19 to Oct 17
Start indoors: Jan 18 to Feb 1Transplant outside: Feb 15 to Mar 1Sow outdoors: Feb 15 to Mar 1Plant for fall: Sep 5 to Sep 26
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 1 to Mar 15Plant for fall: Aug 8 to Aug 29
Start indoors: Jan 18 to Feb 1Transplant outside: Feb 22 to Mar 8Plant for fall: Aug 8 to Aug 29
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 1 to Mar 15Plant for fall: Aug 8 to Aug 29
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 5 to Apr 19Sow outdoors: Apr 5 to Apr 19
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 22 to Apr 5
Sow outdoors: Feb 1 to Feb 22Plant for fall: Aug 22 to Sep 12
Sow outdoors: Feb 1 to Feb 22Plant for fall: Sep 19 to Oct 10
Sow outdoors: Feb 8 to Mar 22Plant for fall: Oct 3 to Oct 24
Start indoors: Feb 15 to Feb 22Transplant outside: Mar 29 to Apr 5Sow outdoors: Mar 22 to Apr 5Plant for fall: Aug 29 to Sep 12
Start indoors: Feb 15 to Feb 22Sow outdoors: Mar 22 to Apr 5Plant for fall: Sep 5 to Sep 19
Start indoors: Feb 15 to Feb 22Sow outdoors: Mar 22 to Apr 5
Start indoors: Feb 15 to Feb 22Transplant outside: Mar 29 to Apr 12
Sow outdoors: Feb 22 to Mar 22Plant for fall: Aug 22 to Sep 5
Sow outdoors: Feb 22 to Mar 22Plant for fall: Sep 5 to Sep 19
Sow outdoors: Feb 22 to Mar 15
Sow outdoors: Mar 1 to Mar 29Plant for fall: Sep 5 to Sep 19
Sow outdoors: Mar 1 to Mar 22Plant for fall: Sep 19 to Oct 10
Sow outdoors: Mar 22 to Apr 12Plant for fall: Aug 29 to Sep 12
Sow outdoors: Mar 22 to Apr 5
Transplant outside: Mar 29 to Apr 19
Plant for fall: Oct 31 to Dec 5
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Ardmore, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 21 – Jan 4 | Feb 15 – Mar 1 | — | — |
| Peppers | Jan 4 – Jan 18 | Mar 29 – Apr 12 | — | — |
| Eggplant | Jan 4 – Jan 18 | Mar 29 – Apr 12 | — | — |
| Tomatoes | Jan 18 – Feb 1 | Mar 22 – Apr 5 | — | — |
| Lettuce | Jan 18 – Feb 1 | Feb 22 – Mar 8 | Feb 15 – Mar 22 | Sep 19 – Oct 17 |
| Kale | Jan 18 – Feb 1 | Feb 15 – Mar 1 | Feb 15 – Mar 1 | Sep 5 – Sep 26 |
| Broccoli | Jan 18 – Feb 1 | Mar 1 – Mar 15 | — | Aug 8 – Aug 29 |
| Cabbage | Jan 18 – Feb 1 | Feb 22 – Mar 8 | — | Aug 8 – Aug 29 |
| Cauliflower | Jan 18 – Feb 1 | Mar 1 – Mar 15 | — | Aug 8 – Aug 29 |
| Okra | Feb 1 – Feb 15 | Apr 5 – Apr 19 | Apr 5 – Apr 19 | — |
| Basil | Feb 1 – Feb 15 | Mar 22 – Apr 5 | — | — |
| Peas | — | — | Feb 1 – Feb 22 | Aug 22 – Sep 12 |
| Spinach | — | — | Feb 1 – Feb 22 | Sep 19 – Oct 10 |
| Radishes | — | — | Feb 8 – Mar 22 | Oct 3 – Oct 24 |
| Cucumbers | Feb 15 – Feb 22 | Mar 29 – Apr 5 | Mar 22 – Apr 5 | Aug 29 – Sep 12 |
| Zucchini & Summer Squash | Feb 15 – Feb 22 | — | Mar 22 – Apr 5 | Sep 5 – Sep 19 |
| Winter Squash & Pumpkins | Feb 15 – Feb 22 | — | Mar 22 – Apr 5 | — |
| Melons & Watermelon | Feb 15 – Feb 22 | Mar 29 – Apr 12 | — | — |
| Carrots | — | — | Feb 22 – Mar 22 | Aug 22 – Sep 5 |
| Beets | — | — | Feb 22 – Mar 22 | Sep 5 – Sep 19 |
| Potatoes | — | — | Feb 22 – Mar 15 | — |
| Swiss Chard | — | — | Mar 1 – Mar 29 | Sep 5 – Sep 19 |
| Cilantro | — | — | Mar 1 – Mar 22 | Sep 19 – Oct 10 |
| Green Beans | — | — | Mar 22 – Apr 12 | Aug 29 – Sep 12 |
| Sweet Corn | — | — | Mar 22 – Apr 5 | — |
| Sweet Potatoes | — | Mar 29 – Apr 19 | — | — |
| Garlic | — | — | — | Oct 31 – Dec 5 |
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 Ardmore, OK weather station, 2 km away (elevation 840 ft (256 m)).
ZIP codes in Ardmore: 73401 73402 73403
Frost dates near Ardmore
- Lone Grove Mar 21 · Nov 8
- Overbrook Mar 15 · Nov 14
- Springer Mar 21 · Nov 8
- Gene Autry Mar 18 · Nov 10
- Mannsville Mar 27 · Nov 8
- Marietta Apr 6 · Nov 2
- Wilson Apr 6 · Nov 1
- Dougherty Apr 4 · Oct 31
Frequently asked questions
When is the last frost in Ardmore, OK?
The median last spring frost in Ardmore, OK is March 15. There is still about a 10% chance of frost after April 2, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Ardmore, OK?
The median first fall frost is November 14, with about a 10% chance of frost before October 29.
How long is the growing season in Ardmore, OK?
About 244 days between the median last spring frost and first fall frost.
What planting zone is Ardmore, OK?
Ardmore, OK is in USDA hardiness zone 8a.