Missouri is transition-zone turf country — tall fescue and kentucky bluegrass alongside bermuda and zoysia. Click a city for its full month-by-month calendar.
| City | Aerate + overseed | Pre-emergent | Season |
|---|---|---|---|
| Kansas City | Sep 3 – Sep 18 | Mar 14 – Apr 4 | 212 days |
| St. Louis | Sep 5 – Sep 20 | Mar 11 – Apr 1 | 217 days |
| Springfield | Aug 28 – Sep 12 | Mar 14 – Apr 4 | 206 days |
Every NOAA weather station in Missouri with complete 1991–2020 frost normals — pick the one nearest you (similar elevation matters more than plain distance).
Across the 171 Missouri locations with complete 1991–2020 frost normals, the average last spring frost — the anchor for pre-emergent and spring work — ranges from Mar 24 (Caruthersville) to Apr 27 (Rosebud), a spread of about 5 weeks driven by elevation, latitude, and terrain. The same job can be weeks apart at opposite ends of the state, which is why a state-level date is only a starting point — pick the location nearest your yard and plan from its calendar.
Missouri lawns run on two opposite calendars. Tall fescue and bluegrass lawns treat early fall as the main event — aerate, overseed, feed — with spring for pre-emergent and light feeding. Bermuda and Zoysia lawns flip it: establish and feed from late spring through summer, stop nitrogen 6–8 weeks before frost, and accept winter brown as normal. Identify your grass first; every date on this page depends on it. Details by task: when to overseed in Missouri, when to aerate in Missouri, when to apply crabgrass pre-emergent in Missouri, and more above.