Missouri Planting Dates, Frost Dates & Growing Season
Missouri’s central location brings variable spring weather that can delay planting.
In a typical year, the growing season in Missouri runs roughly from April 11 through October 25, giving many parts of the state about 197 frost-free days. Use this page as a statewide baseline, then compare local city pages for more precise planting timing.
Growing Season Snapshot
Missouri generally carries enough heat for ambitious warm-season gardening, but the real management issue is often the quality of the season rather than its length. Heavy humidity, weather swings, and a long stretch of summer pressure can make disease resistance and airflow matter more than raw maturity timing.
These season boundaries are climate normals, not a forecast. A 50% frost date means a 32°F frost arrives by that date in about half of years — and later in about half. Treat these dates as planning anchors, not guarantees.
Best next step: Use the Growing Degree Day Planner to test a specific crop and planting date for your exact location.
Missouri Spring Planting Windows
A practical guide to when planting usually works in Missouri. These windows are based on climate normals (not a forecast) and line up with the 50% last spring frost and typical early-season heat.
| Cool-season / early window Cold-tolerant crops that usually handle cooler spring conditions better. | ||
| Peas | March 14 – March 28 | direct sow |
| Spinach | March 14 – March 28 | direct sow |
| Lettuce | March 21 – April 4 | direct sow / transplant |
| Carrots | March 21 – April 4 | direct sow |
| Beets | March 21 – April 4 | direct sow |
| Potatoes | March 28 – April 11 | plant seed potatoes |
| Main warm-season window Crops that usually do best once frost risk fades and the season starts opening up more fully. | ||
| Beans | April 11 – April 25 | direct sow |
| Sweet corn | April 16 – April 26 | direct sow |
| Cucumbers | April 20 – April 30 | direct sow / transplant |
| Squash | April 20 – April 30 | direct sow / transplant |
| Tomatoes | April 20 – April 30 | transplant |
| Peppers | April 27 – May 7 | transplant |
How to use this: aim for the earlier part of each window for the most reliable results. Later planting can still work, but it usually depends more on variety maturity, warmer microclimates, and simple protection like row cover or low tunnels.
How the Growing Season Works in Missouri
Missouri usually gives gardeners more flexibility. A longer season and stronger late-summer heat make staggered planting, second rounds, and longer-maturing crops more realistic than in colder interior regions.
- Stagger planting dates: spreading sowings and transplanting windows often works better than planting everything at once.
- Fall planting is more realistic: many areas still have enough runway for a meaningful second round of faster crops.
- Summer management becomes the limiter: water, fertility, and pest pressure often matter more than season length alone.
Microclimate note: local conditions still matter here. Low spots, exposed sites, and higher elevations often cool faster than the regional median suggests.
Late-summer note: there is often still meaningful heat left around early August, so second plantings of faster crops can still be worthwhile.
Remaining Season Heat in Missouri (Base 50 GDD)
Growing Degree Days (Base 50°F) measure heat accumulation. “Remaining GDD” shows how much usable heat is typically still available from a given date onward in a normal season.
| Planting date | Base | Typical GDD still available |
|---|---|---|
| May 15 | 50 | 3470 |
| June 1 | 50 | 3175 |
| July 1 | 50 | 2462 |
| August 1 | 50 | 1606 |
Use these values to judge whether a crop or variety still has enough heat left after planting. This is especially helpful for later sowings, shorter-maturity choices, and deciding whether a second round is realistic.
Typical Season Rhythm
A practical “typical year” rhythm for planning. Use it as a baseline, then adjust for microclimates and variety maturity.
| Stage | What it usually means |
|---|---|
| Early season | Start cold-tolerant crops, prep beds, and pay more attention to soil warmth and night temperatures than to the calendar alone. |
| Main planting | Around April 11, the main planting push usually begins as frost risk fades. Warm-season crops generally perform best when they get established promptly. |
| Peak growth | This is when water, fertility, spacing, and pest pressure have the biggest effect on final yield. |
| Late-summer decisions | There is often enough late-season heat left for a meaningful second round of quick crops. |
| Finish window | Plan to have frost-sensitive crops mostly wrapped up by October 25. Cooling nights often slow crops before the first real frost arrives. |
Typical season length: 197 frost-free days between the median spring and fall frost dates.
How Growing Conditions Vary Across Missouri
Growing conditions often vary more within Missouri than most gardeners expect. Differences in elevation, exposure, cold-air drainage, and nearby pavement or buildings can shift frost timing and change how much usable season you really have.
| City | Last spring frost | First fall frost | Frost-free days | Remaining GDD (May 15 → Aug 1, base 50) |
|---|---|---|---|---|
| St. Joseph | Apr 19 | Oct 17 | 181 | 3348 → 1464 |
| Kirksville | Apr 21 | Oct 19 | 181 | 3008 → 1333 |
| Columbia | Apr 05 | Oct 31 | 209 | 3626 → 1678 |
| Kansas City | Apr 04 | Nov 02 | 212 | 3877 → 1793 |
| St. Louis | Apr 01 | Nov 04 | 217 | 3966 → 1875 |
| Springfield | Apr 04 | Oct 27 | 206 | 3568 → 1673 |
| Jefferson City | Apr 10 | Oct 26 | 199 | 3593 → 1638 |
- Frost timing varies widely across the region, especially between colder pockets and more sheltered sites.
- Earlier-frost and shorter-season locations usually need faster-maturing crops and tighter planting timing.
- Warmer locations usually retain more remaining heat through the season, giving longer-season crops and later plantings better odds of finishing.
- Urban areas, walls, and sheltered gardens usually stay warmer than open rural or wind-exposed sites.
- Cold air settles in low spots, so slightly elevated beds often avoid the earliest frosts.
- South- and west-facing areas usually warm sooner in spring and can stay productive later into fall.
How Gardeners Adapt
Experienced gardeners in Missouri usually adjust their timing and crop choices to match how the season actually behaves, not just the calendar.
- Using row cover or low tunnels to smooth out temperature swings early and late in the season.
- Succession planting fast crops to keep beds productive through summer.
- Watching local conditions closely and adjusting timing year by year.
Common Timing Mistakes
These patterns show up again and again in Missouri — especially in typical years.
- Planting everything at once instead of staggering crops across the season.
- Assuming conditions are uniform across the region — frost timing often varies widely by elevation, exposure, and shelter.
- Relying on calendar dates instead of crop maturity and typical frost timing.
Remaining Season Heat in Missouri (Base 50 GDD)
Growing Degree Days (Base 50°F) measure heat accumulation. “Remaining GDD” shows how much usable heat is typically still available from a given date onward in a normal season.
| Planting date | Base | Typical GDD still available |
|---|---|---|
| May 15 | 50 | 3470 |
| June 1 | 50 | 3175 |
| July 1 | 50 | 2462 |
| August 1 | 50 | 1606 |
Use these values to judge whether a crop or variety still has enough heat left after planting. This is especially helpful for later sowings, shorter-maturity choices, and deciding whether a second round is realistic.