How to Grow Sweet Corn in a Pot

Place corn seeds in a container, and add water to cover them. Use dwarf sweet corn varieties such as Golden Midget, Midget Hybrid or White Midget. Wait until the longest sprouts reach about 1/4 inch long.

Mix 1/2 bushel of #2 size vermiculite, 1/2 bushel of peat moss, 5 tbsp. of ground limestone, 2 tbsp. of super phosphate and 8 tbsp. of 5-10-5 or 6-12-6 fertilizer. This mixture will serve as your potting soil. You can purchase a commercial potting mix, but growing sweet corn requires large quantities of potting soil and making your own costs less in the long run.

Fill your pot with the soil mix. Use a large pot with a capacity of 10 gallons, for example garbage cans, tubs or bushel baskets. Generally, a 10-gallon container can fit four dwarf plants. If the container has no drainage holes, drill several 1-inch holes in the lowest part of the bottom of the container so water doesn't accumulate in the container.

Water the soil mix in the container until water drains out of the drainage holes.

Dig four holes in the potting soil about two to three times deeper than the average diameter of a the sweet corn seed. Place each seedling in a hole, and cover the hole with soil.

Water the soil every one or two days, keeping the soil moist at all times. When the plant emerges from the soil and reaches a height of 4 to 6 inches, water the soil every two to three days for two to three weeks. After that, add about 1 inch of water once a week to encourage the roots to grow deeper.

Add fertilizer after 10 weeks from planting. Dig a hole about 2 inches in depth and diameter around each plant. Pour 1/2 tbsp. of 5-10-10 or 10-20-20 fertilizer per plant, and replace the soil.