Corn will mold and be ruined if planted in cold, wet soil. Corn needs rich soil to support a large plants, so add liberal amounts of compost, rock phosphate, green sand and high calcium lime to the soil. Plant corn in blocks of rows or mounds to ensure good pollination as the pollen blown from the tassels to the silks of the developing ears. Another application when the plant tassel will increase yield. Keep corn cultivated until the plants are large enough to shade out weeds.
Corn is also useful to inter plant with coop loving plants such as sole crops or lettuce.
Some gardeners use corn as a trellis for pole beans. Squash and cucumbers also thrive under a con canopy. Remember to increase soil amendments if inter planting to ensure adequate fertility. Also increase the distance between rows to allow access and avoid overcrowding. Corn ear worms present an occasional problem.