2026 Planting Guide
Spring cropWhen to Plant Soybeans in Pennsylvania
Complete guide to growing soybeans in Pennsylvania 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 soybeans growing season in Pennsylvania. Red diamond markers indicate frost date boundaries.
Quick Facts
Min. Soil Temp
50°F (10°C) minimum
Growing Period
100-135 days
From planting to harvest
Last Spring Frost
April 28
Wait until after this date
First Fall Frost
October 8
Harvest before this date
Monthly Task Timeline
Month-by-month guide for managing soybeans in Pennsylvania.
January - April
Off-seasonCover crop planting, soil testing, equipment maintenance, and planning for next season.
May - June
PlantPrepare soil, apply starter fertilizer, and sow seeds at recommended depth and spacing.
July - September
Grow & MonitorIrrigate as needed, scout for pests, apply side-dress fertilizer, and manage weeds.
October - November
HarvestCheck maturity indicators, schedule equipment, harvest at optimal moisture content.
December
Off-seasonCover crop planting, soil testing, equipment maintenance, and planning for next season.
Best Soybeans Varieties for Pennsylvania
These varieties have proven performance in Pennsylvania's climate and soil conditions. Always source certified seed from reputable dealers.
| # | Variety | Best For |
|---|---|---|
| 1 | Pioneer P28A42X | Pennsylvania climate |
| 2 | Asgrow AG27X0 | Pennsylvania climate |
| 3 | Channel 2818R2X | Pennsylvania climate |
Growing Tips for Pennsylvania
Region-specific advice from agricultural extension services and experienced Pennsylvania farmers.
Maturity groups 2.5-3.5 for Pennsylvania
Many fields are small and irregularly shaped — GPS guidance helps
Soil pH management critical — lime to pH 6.2-6.8
Pest & Disease Watch
Monitor for these threats throughout the growing season. Integrated Pest Management (IPM) is recommended.
Soybean aphid
Scout regularly and use integrated pest management
Bean leaf beetle
Scout regularly and use integrated pest management
Spider mites
Scout regularly and use integrated pest management
Stink bugs
Scout regularly and use integrated pest management
Soybean cyst nematode
Scout regularly and use integrated pest management
Companion Planting
These plants grow well alongside soybeans, improving pest control, pollination, and nutrient availability.
Frost Dates
Last Spring Frost
April 28
Wait until after this date before planting frost-sensitive crops outdoors.
First Fall Frost
October 8
Plan to complete harvest of warm-season crops before this date arrives.
Frequently Asked Questions
When is the best time to plant soybeans in Pennsylvania?
The optimal planting window for soybeans in Pennsylvania is May 5 to June 10. Soil temperature should reach at least 50°F (10°C) minimum before planting. The total growing period is 100-135 days.
What varieties of soybeans grow best in Pennsylvania?
The best varieties for Pennsylvania include Pioneer P28A42X, Asgrow AG27X0, Channel 2818R2X. These varieties are adapted to local climate and soil conditions and have proven performance records.
When can I harvest soybeans in Pennsylvania?
The harvest window for soybeans in Pennsylvania is typically October 5 to November 5. The crop takes 100-135 days from planting to reach maturity.
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Data Sources
Data sourced from USDA NASS Crop Planting Dates, Pennsylvania 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.