How to Grow Maize
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Maize
Zea mays
grassMaize, also called corn, is a tall annual grass that produces edible kernels on cobs. It is one of the world's most important staple crops, valued for grain, animal feed, oil, and countless processed foods. Maize thrives in warm climates with adequate moisture and grows rapidly during the summer months.
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Example Maize timeline · Pittsburgh, PA (Zone 6b)
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Plant Maize
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 Maize
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Maize dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9; can grow in zone 2-3 with shorter-season varieties
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Get my Maize timeline →Growth Stages
Germination & Seedling
2-3 weeksSeeds germinate in 5-10 days in warm soil. Young seedlings emerge with single leaves and develop the first true leaves.
Ensure soil temperature is at least 50°F (preferably 60-70°F) for good germination. Keep soil consistently moist. Thin seedlings to final spacing early. Watch for cutworms.
Vegetative Growth
3-4 weeksRapid leaf and stem development. Plants grow taller and develop more leaves. Root system expands. Plant reaches V6-V8 stage (6-8 visible leaves).
Apply side-dress nitrogen fertilizer when plants are 6-12 inches tall. Control weeds aggressively during this period. Ensure adequate water. Monitor for insects like armyworms and corn borers.
Pre-flowering & Tassel Development
2-3 weeksMale tassel emerges at the top of the plant. Female silks begin developing within ear husks. Plant height accelerates. Ear development begins below upper leaves.
Critical water period—maintain consistent moisture. Do not let soil dry out. Ensure no nutrient deficiencies visible. Reduce nitrogen to prevent excessive vegetative growth that can shade ears.
Flowering & Pollination
1-2 weeksTassel sheds pollen; silks emerge from ear husks. Pollen drifts onto silks for kernel development. Ears fill with developing kernels.
Maintain even moisture for successful pollination and kernel set. This is the most critical stage for yield. Very hot, dry weather reduces fertility. Avoid excessive nitrogen which can reduce pollen viability.
Grain Fill & Maturity
4-6 weeksKernels develop and accumulate starch and nutrients. Husks dry and tighten around cob. Kernels progress from milk stage to dough stage to hard stage. Plant senescence begins.
Reduce watering gradually as kernels mature. For fresh corn, harvest at milk stage (10-14 days after silking). For dry corn or seed, allow kernels to harden completely. Harvest before first frost in northern zones.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Plant resistant varieties; use Bt (Bacillus thuringiensis) spray; remove and destroy infested plants; crop rotation
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Bt spray; neem oil; spinosad; encourage natural predators; handpick
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Bt spray applied when silks emerge; parasitic wasps; remove infested ears early
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Cutworm collars around seedlings; till soil to expose larvae; beneficial nematodes; diatomaceous earth
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Row covers on young plants; insecticidal soap; neem oil; kaolin clay
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Remove and destroy galls before they release spores; select resistant varieties; avoid excess nitrogen and moisture
Uses
Fresh eating & cooking
CulinarySweet corn varieties are boiled, grilled, roasted, or cut from the cob for soups, salads, and side dishes. Peak flavor occurs shortly after harvest and declines rapidly during storage. [source]
Grain & flour production
CulinaryMature corn kernels are dried, ground into flour (cornmeal), or processed into polenta, grits, tortillas, cornbread, and countless processed foods. Field corn varieties are used for this purpose. [source]
Biofuel & starch
HouseholdCorn is processed into ethanol for fuel and high-fructose corn syrup, corn oil, and cornstarch for industrial and food applications. It is a key renewable energy source. [source]
Corn silk tea & traditional use
MedicinalCorn silks (stigmas) are dried and brewed as a mild diuretic tea used in traditional medicine for urinary and kidney health. Contains polyphenols with potential antioxidant properties. [source]
Wildlife habitat & food
WildlifeCorn provides essential food and shelter for birds, deer, raccoons, and other wildlife. Leaving standing corn in fall benefits migrating birds and overwintering insects. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
For fresh sweet corn: harvest at milk stage when silks turn brown and kernels release milky liquid when pierced (10-20 days after silking). Pick in early morning for best sweetness. For dry corn or popcorn: allow kernels to harden completely; husks turn papery and brown. Ears should snap cleanly from stalk. Hang in dry location for 4-6 weeks before shelling. Store dried kernels in cool, dry location.
Fun Facts
- 🌱 Corn is one of the most genetically diverse crops on Earth; indigenous peoples of Mesoamerica domesticated it from teosinte (a wild grass) over 9,000 years ago through selective breeding.
- 🌱 A single corn plant can produce 400-600 kernels per ear, and a mature plant's root system can extend 3-4 feet deep and spread 6-12 feet horizontally to seek water and nutrients.
- 🌱 Corn is wind-pollinated and produces massive amounts of pollen—a single tassel can shed over 20 million pollen grains in a few days, which is why corn fields grown near each other cross-pollinate easily.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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