2026 Planting Guide
Spring cropWhen to Plant Corn (Maize) in Missouri
Complete guide to growing corn (maize) in Missouri with optimal planting dates, recommended varieties, soil requirements, pest management, and harvest timing. Data sourced from USDA and state extension services.
Monthly Planting Calendar
Visual overview of the corn (maize) growing season in Missouri. Red diamond markers indicate frost date boundaries.
Quick Facts
Min. Soil Temp
50°F (10°C) minimum
Growing Period
105-120 days
From planting to harvest
Last Spring Frost
April 10
Wait until after this date
First Fall Frost
October 18
Harvest before this date
Monthly Task Timeline
Month-by-month guide for managing corn (maize) in Missouri.
January - March
Off-seasonCover crop planting, soil testing, equipment maintenance, and planning for next season.
April - May
PlantPrepare soil, apply starter fertilizer, and sow seeds at recommended depth and spacing.
June - August
Grow & MonitorIrrigate as needed, scout for pests, apply side-dress fertilizer, and manage weeds.
September - October
HarvestCheck maturity indicators, schedule equipment, harvest at optimal moisture content.
November - December
Off-seasonCover crop planting, soil testing, equipment maintenance, and planning for next season.
Best Corn (Maize) Varieties for Missouri
These varieties have proven performance in Missouri's climate and soil conditions. Always source certified seed from reputable dealers.
| # | Variety | Best For |
|---|---|---|
| 1 | Pioneer P1366AML | Missouri climate |
| 2 | DeKalb DKC67-44 | Missouri climate |
| 3 | MorCorn MC 4250 | Missouri climate |
Growing Tips for Missouri
Region-specific advice from agricultural extension services and experienced Missouri farmers.
Bootheel region plants earliest in the state
Feral hog damage increasing — use deterrents near field edges
Apply fungicide at VT/R1 in fields with disease history
Pest & Disease Watch
Monitor for these threats throughout the growing season. Integrated Pest Management (IPM) is recommended.
Corn borers
Scout regularly and use integrated pest management
Corn rootworm
Scout regularly and use integrated pest management
Fall armyworm
Scout regularly and use integrated pest management
Aphids
Scout regularly and use integrated pest management
Cutworms
Scout regularly and use integrated pest management
Companion Planting
These plants grow well alongside corn (maize), improving pest control, pollination, and nutrient availability.
Frost Dates
Last Spring Frost
April 10
Wait until after this date before planting frost-sensitive crops outdoors.
First Fall Frost
October 18
Plan to complete harvest of warm-season crops before this date arrives.
Frequently Asked Questions
When is the best time to plant corn (maize) in Missouri?
The optimal planting window for corn (maize) in Missouri is April 10 to May 10. Soil temperature should reach at least 50°F (10°C) minimum before planting. The total growing period is 105-120 days.
What varieties of corn (maize) grow best in Missouri?
The best varieties for Missouri include Pioneer P1366AML, DeKalb DKC67-44, MorCorn MC 4250. These varieties are adapted to local climate and soil conditions and have proven performance records.
When can I harvest corn (maize) in Missouri?
The harvest window for corn (maize) in Missouri is typically September 15 to October 25. The crop takes 105-120 days from planting to reach maturity.
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Data Sources
Data sourced from USDA NASS Crop Planting Dates, Missouri Cooperative Extension Service, and NOAA frost date records. Last updated: March 2026.
Planting dates are averages and may vary by county, elevation, and local microclimate. Always consult your local extension office for the most precise recommendations.