Frost Dates for Ardmore, OK
In Ardmore, OK, the average last spring frost is around Mar 15 and the average first fall frost around Nov 14, for a growing season of about 244 days. For frost-tender plants, wait until Apr 2, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Ardmore, OK weather station, 2 miles away, elevation 841 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Apr 2 | Oct 29 |
| 20% | Mar 28 | Nov 3 |
| 30% | Mar 23 | Nov 7 |
| 40% | Mar 18 | Nov 10 |
| 50% | Mar 15 | Nov 14 |
| 60% | Mar 10 | Nov 18 |
| 70% | Mar 6 | Nov 21 |
| 80% | Mar 2 | Nov 26 |
| 90% | Feb 24 | Dec 2 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Mar 27 | Nov 5 |
| Frost / freeze (32°F) | Mar 15 | Nov 14 |
| Hard freeze (28°F) | Mar 3 | Nov 26 |
Planting calendar for Ardmore
Transplant Mar 22 – Apr 5
Transplant Mar 29 – Apr 12
Transplant Mar 29 – Apr 12
Transplant Mar 22 – Apr 5
Sow or transplant Mar 22 – Apr 5
Sow or transplant Mar 22 – Apr 5
Sow or transplant Mar 29 – Apr 12
Sow or transplant Feb 15 – Mar 1
Fall sowing Sep 19 – Oct 17
Fall sowing Sep 19 – Oct 10
Fall sowing Sep 5 – Sep 19
Sow or transplant Feb 15 – Mar 1
Fall sowing Sep 5 – Oct 3
Transplant Mar 1 – Mar 15
Fall sowing Aug 22 – Sep 5
Transplant Feb 22 – Mar 8
Fall sowing Aug 22 – Sep 5
Fall sowing Aug 22 – Sep 5
Fall sowing Oct 3 – Oct 24
Fall sowing Sep 5 – Sep 19
Plant Feb 15 – Mar 1
Based on the average last frost (Mar 15) and first frost (Nov 14). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.