Sun: Plant in full sun (6 to 8 hours). Space 8 to 12 inches apart within rows, with a 30- to 36-inch distance between rows. Plant from mid-March to late May.
Soil: Amend with organic matter to create a well-drained soil. Avoid planting in unamended sandy or heavy clay soils. If the soil test shows the pH is below 6.2, apply lime as recommended.
Water: Keep soil consistently moist, but not saturated. Apply 1 to 2 inches of water each week and more during hot summer days. Avoid wetting leaves to avoid fungal diseases. Mulch helps retain moisture.
Plant: Direct sow seeds one inch deep. Plant corn in blocks of 4 rows to aid in self-pollination.
Fertilize: In the absence of a soil test, apply an all-purpose fertilizer (8-8-8 or 10-10-10) at planting, according to label directions. Reapply 4 to 6 inches from stem (side-dress), 4 to 6 weeks after planting.
Insects/Diseases/Weeds: Scout plants frequently for insect and disease damage. Use insecticidal soap (for soft-bodied insects) or Bt dust or spray (for caterpillars, or worms). Spray fungicide regularly to suppress common fungal diseases. Always follow label instructions. Mulch inhibits weeds and diseases.
Harvest: Harvest ears when kernels in the center of the ear are full and milky when squeezed, usually 18 to 21 days from silking. Harvest time varies depending on the variety.
Other: Corn is a grass. It relies on wind to pollinate its flowers, which is why it is best to plant in short blocks instead of long rows.
Visit www.aces.edu/go/growmore for more information.
Learn how to grow the best fruits and vegetables with the Grow More Garden Series at www.aces.edu/go/growmore.
Bethany O’Rear, Regional Extension Agent, Home Grounds, Gardens, and Home Pests, Auburn University
New November 2023, Grow More Sweet Corn, ANR-2876-HH