State × crop calendar
Corn planting in Maryland.
- Primary crop
- Zone 7a
- 195-day season
- Last frost April 15
- Row Crop
- Frost Sensitive
Corn planting in Maryland is shaped by the state's 7a dominant hardiness zone, last frost date around April 15, and a 195-day growing season. Corn is widely grown in Maryland — commercially significant or common in home gardens and food plots.
Planting dates on this page are climatological estimates from USDA frost-date norms and zone-typical planting offsets. Verify against University of Maryland Extension for variety- and county-specific guidance.
Planting calendar — 2026
Frost-anchored windows.
Corn · Maryland · planting calendar
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
Planting windows
Earliest → ideal → latest.
Spring planting
CornEarliest
April 8
Ideal start
April 15
Ideal end
May 6
Latest
May 20
Soil-temp trigger
Wait for 50°F at 2-inch soil depth — typically 1 week after last frost in northern states; close to last frost in southern states.Harvest window
Typical start
July 14
Typical end
August 13
Harvest timing varies with planting date and seasonal weather — these dates are typical for the ideal planting window.
Growing notes
Corn grows well in Maryland's typical climate. Maryland's 195-day growing season and 7a hardiness zone support reliable production with appropriate variety selection.
Corn is widely grown in Maryland — commercially significant or common in home gardens and food plots.
Agronomy reference
Corn fundamentals.
Soil-temp minimum
50°F
Soil-temp optimum
60–86°F
Days to maturity
90–120
Water (in/wk)
1–1.5"
Soil pH
6–6.8
Nitrogen demand
high
Growing-degree-day requirement: 2400 GDD (base 50°F) from planting to maturity.
Maturity varies by hybrid relative maturity (RM) — choose RM appropriate for your growing season length.
Common pests to watch
- European corn borer
- Western corn rootworm
- Corn earworm
Pest pressure varies by region and year. Confirm current outbreaks with University of Maryland Extension.
Common diseases
- Gray leaf spot
- Northern corn leaf blight
- Tar spot
Resistance varieties shift each year. Check the current variety trial report for your state.
Variety selection
Corn varieties for Maryland live with your extension.
Variety selection
Variety performance is micro-regional and changes with each year's trial cycle. We don't republish variety lists — instead, we point directly at the source.
University of Maryland Extension →Search the extension site for “corn variety trial” or “recommended corn varieties” to find the current report.
Yield varies significantly by variety, soil, fertility, and management. Consult your state extension service for variety performance trials in your region.
Corn timing. Live alerts.
Bield: Farm ties weather and soil-temperature stations in your county to crop planting thresholds — get notified the day soil temp clears your target window.
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