Missouri planting zones & frost dates
The 7 Missouri cities on this site fall in zones 6b, 7a. Last spring frost dates range from Apr 7 in St. Louis to Apr 16 in O'Fallon.
| City | Zone | Last frost | First frost | Population |
|---|---|---|---|---|
| Kansas City | 6b | Apr 10 | Oct 29 | 516,032 |
| St. Louis | 7a | Apr 7 | Oct 31 | 279,695 |
| Springfield | 6b | Apr 16 | Oct 22 | 170,596 |
| Columbia | 6b | Apr 12 | Oct 25 | 130,900 |
| Independence | 6b | Apr 16 | Oct 22 | 121,629 |
| Lee's Summit | 6b | Apr 13 | Oct 23 | 106,419 |
| O'Fallon | 6b | Apr 16 | Oct 20 | 95,355 |
Frost dates are 30%-risk dates from the nearest suitable NOAA station. Population: Census Vintage 2024 estimates.