Oklahoma planting zones & frost dates
The 6 Oklahoma cities on this site fall in zone 7b. Last spring frost dates range from Apr 3 in Lawton to Apr 18 in Edmond.
| City | Zone | Last frost | First frost | Population |
|---|---|---|---|---|
| Oklahoma City | 7b | Apr 10 | Oct 29 | 712,919 |
| Tulsa | 7b | Apr 5 | Oct 30 | 415,154 |
| Norman | 7b | Apr 9 | Oct 29 | 131,010 |
| Broken Arrow | 7b | Apr 8 | Oct 26 | 122,756 |
| Edmond | 7b | Apr 18 | Oct 23 | 99,040 |
| Lawton | 7b | Apr 3 | Nov 1 | 90,027 |
Frost dates are 30%-risk dates from the nearest suitable NOAA station. Population: Census Vintage 2024 estimates.