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Missouri frost dates
Across the 25Missouri weather stations below, the average last spring frost ranges from Mar 31 in Poplar Bluff to Apr 23 in Salem 10 W. The statewide middle is about Apr 9 for the last spring frost and Oct 25 for the first fall frost. Louis Lambert has the longest growing season, about 216 days. Hardiness zones in these places: 5b, 6a, 6b, 7a, 7b.
Frost dates by city
| Place | Zone | Last spring frost | 90% safe after | First fall frost | Frost-free days |
|---|---|---|---|---|---|
| Poplar Bluff | 7b | Mar 31 | Apr 15 | Oct 31 | 214 |
| Louis Lambert | 7a | Apr 2 | Apr 17 | Nov 4 | 216 |
| Kansas Downtown | 6b | Apr 4 | Apr 20 | Nov 2 | 212 |
| Springfield Wbo | 6b | Apr 4 | Apr 20 | Oct 27 | 206 |
| Cape Girardeau | 7a | Apr 5 | Apr 21 | Oct 25 | 203 |
| Charles | 6b | Apr 5 | Apr 21 | Oct 27 | 205 |
| Joplin 24 N | 7a | Apr 6 | Apr 23 | Oct 24 | 201 |
| Advance 1 S | 7a | Apr 7 | Apr 21 | Oct 27 | 203 |
| Columbia | 6b | Apr 7 | Apr 21 | Oct 29 | 205 |
| Lees Summit | 6b | Apr 7 | Apr 24 | Oct 29 | 205 |
| West Plains | 7a | Apr 8 | Apr 26 | Oct 25 | 200 |
| Joplin | 7a | Apr 9 | Apr 26 | Oct 27 | 201 |
| Springfield | 7a | Apr 9 | Apr 27 | Oct 27 | 201 |
| Jefferson | 6b | Apr 10 | Apr 25 | Oct 26 | 199 |
| Marshall | 6b | Apr 10 | Apr 27 | Oct 24 | 197 |
| Sedalia | 6b | Apr 10 | Apr 26 | Oct 26 | 199 |
| Louis Sprt Of S L | 6b | Apr 12 | Apr 27 | Oct 23 | 194 |
| Vichy Rolla National | 6b | Apr 12 | Apr 30 | Oct 25 | 196 |
| Kansas | 6b | Apr 13 | Apr 29 | Oct 24 | 194 |
| Chillicothe 22 Ene | 6a | Apr 15 | May 2 | Oct 20 | 188 |
| Chillicothe Agri-Sci | 6a | Apr 15 | May 1 | Oct 21 | 189 |
| Joseph Rosecrans | 6a | Apr 19 | May 3 | Oct 17 | 181 |
| Kirksville | 6a | Apr 19 | May 5 | Oct 18 | 182 |
| Tarkio | 5b | Apr 19 | May 4 | Oct 15 | 179 |
| Salem 10 W | 6b | Apr 23 | May 9 | Oct 14 | 174 |
Dates are the 50% probability of a 32°F freeze (NOAA 1991–2020 normals); "90% safe after" is the date after which a later spring freeze happens in only 1 year in 10.
When to plant in Missouri
Using the statewide middle dates (last frost Apr 9, first frost Oct 25). Adjust for your town with the table above or the planting calendar.
| Plant | When to plant in Missouri |
|---|---|
| Tomatoes | Apr 16 – Apr 30 |
| Peas | Feb 26 – Mar 19; fall: Aug 2 – Aug 23 |
| Potatoes | Mar 12 – Apr 2 |
| Green beans | Apr 16 – Apr 30; fall: Aug 9 – Aug 23 |
| Garlic | Oct 25 – Nov 22 |
| Tulips | Oct 11 – Nov 22 |