2 varieties possess the longest harvest and storage periods and have the highest sugar content. However, sh2 varieties do have some disadvantages. The seed coats on this type are fairly thick, giving the kernels a tougher or crunchy texture. Yields of super sweets are generally lower than standard sweet corn varieties. They are also slow to germinate and have reduced seedling vigor.
Sweet corn performs best in fertile, well-drained soils in full sun.
Standard sweet corn varieties may be planted in late April in central Iowa. It's generally recommended that se varieties be planted 1 week later than standard sweet corn varieties. For a continuous supply of sweet corn, plant early, mid- season, and late varieties or plant every 2 or 3 weeks. The last practical date for planting early varieties is July 1. Sow seed at a depth of 1 inch in heavy soils.