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Corn

Zea mays subsp. mays

Category: Grains

Sweet corn is an annual with yellow, white, and bi-colored ears. A long, frost-free growing season is necessary after planting. Sweet corn is wind-pollinated, so it should be planted in blocks, rather than in single rows. Early, mid, and late-season varieties extend the harvest. If you miss the optimal harvest time, corn will go downhill fast as sugars convert to starch.

How to Grow Corn

Quick Info

Spacing
4/Square
Depth
1.5 in
1.5 in
Sun
Full Sun
Water
1.5 in/week
Season
Warm
Frost
Semi-Tolerant
Height
5-8 ft
Germination
7-14 days
Germination Temp
65-95 °F
Sprout to Harvest
55-90 days
Soil pH
Acidic - Slightly Acidic

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Varieties

Amaize Hybrid
Amaize Hybrid Amaize is asked for by name at grocery stores around the country because of its unrivaled flavor.
Ambrosia Hybrid
Ambrosia Hybrid Plump and sweet. Perfect for summer picnics.
Bonus
Bonus Tiny Asian ears for stir fry yields up to three cobs per plant!
Country Gentleman
Country Gentleman HEIRLOOM. From 1890, this unusual white corn has irregular rows and great flavor.
Early Sunglow Hybrid
Early Sunglow Hybrid Great early variety, thrives in cool weather.
Full Season Suntava Purple Hybrid
Full Season Suntava Purple Hybrid Extraordinary purple corn is scrumptious and healthy!
Golden Bantam
Golden Bantam HEIRLOOM. This variety made yellow sweet corn popular.
Illini Xtra Sweet Hybrid
Illini Xtra Sweet Hybrid Four times as sweet as standard hybrids.
View all 22 varieties →

Companion Plants

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Combative Plants

For the "why" behind this companion planting info, open in the Planter phone, tablet, or web app .

Nutrition

Vitamins

Nutrients

Pests

Diseases

Beneficial Critters

Growing from Seed

Plant seeds 1 inch deep and 4 to 6 inches apart. Space rows 30 to 36 inches apart.

Planting Considerations

Corn is picky about its soil. Work in compost the fall before planting and let over winter in the soil. Starting seeds indoors is not recommended.

Feeding

You may choose to fertilize at planting time, corn is meant to grow rapidly. If you are confident that the soil is adequate, this can be skipped.

Harvesting

Harvest when tassels begin to turn brown and cobs start to swell. Kernels should be full and milky. Pull ears downward and twist to take off stalk.

Storage

Sweet corn varieties lose their sweetness soon after harvesting. Prepare for eating or preserving immediately after picking. Sweet corn freezes well, especially if removed from ears before freezing. If you do store your corn in the fridge, leave them in their husks!

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