Frost dates for 73402 — Ardmore, OK
Last spring frostMar 21median date
First fall frostNov 8median date
Growing season232 daysfrost-free
Hardiness zone8aZone 8a
How Ardmore compares
- In 8 years out of 10, the last spring frost in Ardmore falls between March 3 and April 10, a 38-day window. The first fall frost falls between October 24 and November 28.
- The median last frost is 14 days earlier than the Oklahoma median of Apr 4.
- Its 232-day growing season is longer than 96% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is 8 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 56 nights a year at or below 32°F.
- Compared with Norman, OK, 104 km away, the last frost here is 13 days earlier than there and the growing season is 18 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 3 |
| 50% (median) | March 21 |
| 10% (safe for tender plants) | April 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 24 |
| 50% (median) | November 8 |
| 90% (late) | November 28 |
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 73402 — Ardmore, OK — last frost Mar 21, first frost Nov 8, zone 8a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 27 to Jan 10Start indoors: Dec 27 to Jan 10Transplant outside: Feb 21 to Mar 7
Start indoors: Jan 10 to Jan 24Transplant outside: Apr 4 to Apr 18
Start indoors: Jan 10 to Jan 24Transplant outside: Apr 4 to Apr 18
Start indoors: Jan 24 to Feb 7Transplant outside: Mar 28 to Apr 11
Start indoors: Jan 24 to Feb 7Transplant outside: Feb 28 to Mar 14Sow outdoors: Feb 21 to Mar 28Plant for fall: Sep 13 to Oct 11
Start indoors: Jan 24 to Feb 7Transplant outside: Feb 21 to Mar 7Sow outdoors: Feb 21 to Mar 7Plant for fall: Aug 30 to Sep 20
Start indoors: Jan 24 to Feb 7Transplant outside: Mar 7 to Mar 21Plant for fall: Aug 2 to Aug 23
Start indoors: Jan 24 to Feb 7Transplant outside: Feb 28 to Mar 14Plant for fall: Aug 2 to Aug 23
Start indoors: Jan 24 to Feb 7Transplant outside: Mar 7 to Mar 21Plant for fall: Aug 2 to Aug 23
Start indoors: Feb 7 to Feb 21Transplant outside: Apr 11 to Apr 25Sow outdoors: Apr 11 to Apr 25
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 28 to Apr 11
Sow outdoors: Feb 7 to Feb 28Plant for fall: Aug 16 to Sep 6
Sow outdoors: Feb 7 to Feb 28Plant for fall: Sep 13 to Oct 4
Sow outdoors: Feb 14 to Mar 28Plant for fall: Sep 27 to Oct 18
Start indoors: Feb 21 to Feb 28Transplant outside: Apr 4 to Apr 11Sow outdoors: Mar 28 to Apr 11Plant for fall: Aug 23 to Sep 6
Start indoors: Feb 21 to Feb 28Sow outdoors: Mar 28 to Apr 11Plant for fall: Aug 30 to Sep 13
Start indoors: Feb 21 to Feb 28Sow outdoors: Mar 28 to Apr 11
Start indoors: Feb 21 to Feb 28Transplant outside: Apr 4 to Apr 18
Sow outdoors: Feb 28 to Mar 28Plant for fall: Aug 16 to Aug 30
Sow outdoors: Feb 28 to Mar 28Plant for fall: Aug 30 to Sep 13
Sow outdoors: Feb 28 to Mar 21
Sow outdoors: Mar 7 to Apr 4Plant for fall: Aug 30 to Sep 13
Sow outdoors: Mar 7 to Mar 28Plant for fall: Sep 13 to Oct 4
Sow outdoors: Mar 28 to Apr 18Plant for fall: Aug 23 to Sep 6
Sow outdoors: Mar 28 to Apr 11
Transplant outside: Apr 4 to Apr 25
Plant for fall: Oct 25 to Nov 29
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 27 – Jan 10 | Feb 21 – Mar 7 | — | — |
| Peppers | Jan 10 – Jan 24 | Apr 4 – Apr 18 | — | — |
| Eggplant | Jan 10 – Jan 24 | Apr 4 – Apr 18 | — | — |
| Tomatoes | Jan 24 – Feb 7 | Mar 28 – Apr 11 | — | — |
| Lettuce | Jan 24 – Feb 7 | Feb 28 – Mar 14 | Feb 21 – Mar 28 | Sep 13 – Oct 11 |
| Kale | Jan 24 – Feb 7 | Feb 21 – Mar 7 | Feb 21 – Mar 7 | Aug 30 – Sep 20 |
| Broccoli | Jan 24 – Feb 7 | Mar 7 – Mar 21 | — | Aug 2 – Aug 23 |
| Cabbage | Jan 24 – Feb 7 | Feb 28 – Mar 14 | — | Aug 2 – Aug 23 |
| Cauliflower | Jan 24 – Feb 7 | Mar 7 – Mar 21 | — | Aug 2 – Aug 23 |
| Okra | Feb 7 – Feb 21 | Apr 11 – Apr 25 | Apr 11 – Apr 25 | — |
| Basil | Feb 7 – Feb 21 | Mar 28 – Apr 11 | — | — |
| Peas | — | — | Feb 7 – Feb 28 | Aug 16 – Sep 6 |
| Spinach | — | — | Feb 7 – Feb 28 | Sep 13 – Oct 4 |
| Radishes | — | — | Feb 14 – Mar 28 | Sep 27 – Oct 18 |
| Cucumbers | Feb 21 – Feb 28 | Apr 4 – Apr 11 | Mar 28 – Apr 11 | Aug 23 – Sep 6 |
| Zucchini & Summer Squash | Feb 21 – Feb 28 | — | Mar 28 – Apr 11 | Aug 30 – Sep 13 |
| Winter Squash & Pumpkins | Feb 21 – Feb 28 | — | Mar 28 – Apr 11 | — |
| Melons & Watermelon | Feb 21 – Feb 28 | Apr 4 – Apr 18 | — | — |
| Carrots | — | — | Feb 28 – Mar 28 | Aug 16 – Aug 30 |
| Beets | — | — | Feb 28 – Mar 28 | Aug 30 – Sep 13 |
| Potatoes | — | — | Feb 28 – Mar 21 | — |
| Swiss Chard | — | — | Mar 7 – Apr 4 | Aug 30 – Sep 13 |
| Cilantro | — | — | Mar 7 – Mar 28 | Sep 13 – Oct 4 |
| Green Beans | — | — | Mar 28 – Apr 18 | Aug 23 – Sep 6 |
| Sweet Corn | — | — | Mar 28 – Apr 11 | — |
| Sweet Potatoes | — | Apr 4 – Apr 25 | — | — |
| Garlic | — | — | — | Oct 25 – Nov 29 |
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 7wnw Mesonet, OK weather station, 8 km away (elevation 928 ft (283 m)).
ZIP codes in Ardmore: 73401 73402 73403
Frost dates near Ardmore
- Springer Mar 21 · Nov 8
- Lone Grove Mar 21 · Nov 8
- Graham Apr 6 · Nov 1
- Gene Autry Mar 18 · Nov 10
- Dougherty Apr 4 · Oct 31
- Healdton Apr 6 · Nov 1
- Fox Apr 6 · Nov 1
- Wilson Apr 6 · Nov 1
Frequently asked questions
When is the last frost in Ardmore, OK?
The median last spring frost in Ardmore, OK is March 21. There is still about a 10% chance of frost after April 10, 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 8, with about a 10% chance of frost before October 24.
How long is the growing season in Ardmore, OK?
About 232 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.