How to Grow Field Corn
Field Corn
Zea mays
vegetableField corn, also called dent corn or feed corn, is a tall annual grass crop grown for its large kernel-bearing ears. Unlike sweet corn, field corn is bred for starch content and livestock feed rather than fresh eating. It's one of the world's most important agricultural crops, used for animal feed, ethanol production, and industrial products.
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Example Field Corn timeline · Pittsburgh, PA (Zone 6b)
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Plant Field Corn
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Field Corn
Around Jul 16≈ 90 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Field Corn dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 4-8 ideal; grows well across much of continental North America
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Germination & Seedling
1-2 weeksSeeds sprout and emerge above soil with first true leaves appearing. Plants are 2-4 inches tall with visible cotyledons and leaf development.
Ensure consistent soil moisture; protect from birds and rodents; thin seedlings if crowded. Soil temperature should be 50°F minimum, ideally 60°F+.
Vegetative Growth
3-4 weeksRapid leaf and stem development; plant reaches 12-36 inches with 4-8 true leaves. Root system expands deeply into soil.
Apply nitrogen fertilizer in split applications; monitor for weeds and early pests; ensure adequate water. Cultivate gently to control weeds without damaging roots.
Tassel & Silk Development
2-3 weeksMale flower (tassel) emerges at plant top; female flowers (silks) develop on ear nodes. Plant height near maximum at 6-10 feet depending on variety.
Critical water period—consistent moisture essential for pollination. Maintain nitrogen levels; monitor closely for pests like corn borers. Do not disturb tassels or silks.
Pollination & Grain Fill
4-6 weeksSilks receive pollen; kernels form and fill with starch. Ears enlarge and kernels develop from milky to dough stage to hard dent stage.
Continue consistent watering through grain-fill; reduce nitrogen applications. Watch for late-season pests and disease. Avoid harvest stress.
Maturity & Harvest Readiness
2-3 weeksKernels fully mature with characteristic dent or wrinkle on crown. Husks dry and turn brown; silks dry completely. Kernels are hard, typically 15-20% moisture content.
Monitor moisture content (commercial harvest at 15-20% for combines); allow field drying if possible. Prevent bird and wildlife damage. Plan harvest logistics.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Bt (Bacillus thuringiensis) sprays; resistant varieties; crop rotation; remove infected plant debris; pheromone traps for monitoring
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Bt sprays; neem oil; beneficial insects; timely silking management; resistant varieties
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Early detection; Bt; spinosad; parasitoid wasps; manage weeds as alternate hosts
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Cutworm collars around seedlings; diatomaceous earth; beneficial nematodes; reduce organic debris
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Kaolin clay barriers; insecticides if severe; crop rotation; remove alternative hosts
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Strong water spray; insecticidal soap; beneficial predators like ladybugs and lacewings
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Remove galls before spore release; sanitation; resistant varieties; crop rotation
Uses
Livestock & Animal Feed
CulinaryField corn kernels are ground into meal or cracked as primary feed for cattle, pigs, poultry, and horses. Corn is a high-carbohydrate energy source in animal agriculture worldwide. [source]
Ethanol & Biofuel Production
HouseholdFermented field corn is the primary feedstock for ethanol fuel production, reducing petroleum dependence. A significant portion of the US corn crop is converted to fuel ethanol and distiller's byproducts. [source]
Corn Starch & Industrial Products
HouseholdField corn starch is extracted and used in adhesives, textiles, biodegradable plastics, and numerous industrial applications. Corn flour and cornmeal from field corn are also used in processed foods. [source]
Human Food Production
CulinaryField corn is processed into flour, meal, oil, and high-fructose corn syrup. While not fresh-eaten like sweet corn, it's a foundational ingredient in many human foods and products. [source]
Wildlife Food & Habitat
WildlifeMature field corn provides food and cover for wild birds, deer, and small mammals. Cornstalks left standing provide essential winter habitat for pheasants, songbirds, and other wildlife. [source]
Harvest Tips
Harvest when kernels reach hard dent stage and moisture content is 15-20%. Grain should be hard and not dent easily with fingernail. Manually harvest ears by snapping them sideways off the stalk or use mechanical combine. For small-scale harvest, break cobs by hand or run through a sheller. Store in cool, dry location with good airflow (below 15% moisture for long-term storage). Commercial harvest typically occurs 120-160 days after planting depending on variety.
Fun Facts
- 🌱 A single corn plant can produce 1-2 ears, with each ear containing 300-400+ kernels arranged in 12-16 rows. A mature ear typically weighs 4-8 ounces.
- 🌱 Field corn requires cross-pollination—the tassel (male) sheds pollen that falls on silks (female). A single ear can receive millions of pollen grains, and each kernel requires exactly one pollen grain on its corresponding silk to develop.
- 🌱 The United States is the world's largest producer of field corn, accounting for about 35% of global corn production. A typical American farm might grow field corn on hundreds or thousands of acres, with average yields around 175 bushels per acre (about 10,000 kg/hectare).
Gardening Terms
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