2026 Planting Guide
Spring cropWhen to Plant Corn (Maize) in California
Complete guide to growing corn (maize) in California 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 California. Red diamond markers indicate frost date boundaries.
Quick Facts
Min. Soil Temp
55°F (13°C) minimum
Growing Period
100-130 days
From planting to harvest
Last Spring Frost
February 15
Wait until after this date
First Fall Frost
December 1
Harvest before this date
Monthly Task Timeline
Month-by-month guide for managing corn (maize) in California.
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 California
These varieties have proven performance in California's climate and soil conditions. Always source certified seed from reputable dealers.
| # | Variety | Best For |
|---|---|---|
| 1 | Pioneer P2089YHR | California climate |
| 2 | DeKalb DKC68-69 | California climate |
| 3 | Syngenta NK1677-3120A | California climate |
Growing Tips for California
Region-specific advice from agricultural extension services and experienced California farmers.
Central Valley is primary corn region — use furrow or drip irrigation
Silage corn hybrids common for dairy operations
Monitor water allocations — adjust planting acreage accordingly
Apply zinc sulfate where soils are zinc-deficient
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
February 15
Wait until after this date before planting frost-sensitive crops outdoors.
First Fall Frost
December 1
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 California?
The optimal planting window for corn (maize) in California is April 1 to May 15. Soil temperature should reach at least 55°F (13°C) minimum before planting. The total growing period is 100-130 days.
What varieties of corn (maize) grow best in California?
The best varieties for California include Pioneer P2089YHR, DeKalb DKC68-69, Syngenta NK1677-3120A. These varieties are adapted to local climate and soil conditions and have proven performance records.
When can I harvest corn (maize) in California?
The harvest window for corn (maize) in California is typically September 1 to October 30. The crop takes 100-130 days from planting to reach maturity.
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Data Sources
Data sourced from USDA NASS Crop Planting Dates, California 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.