Suggested planting rates are 12 to 15 pounds of sweet corn seed per acre. Sized seed permits more specific and precise planting. Sweet corn rows are usually spaced 36 to 38 inches apart. Spacing within the row should be 8 to 12 inches, depending upon vigor and size of variety. Plant early and short varieties about 8 inches apart, and tall and late maturing varieties up to 12 inches apart.
Poor stands are often the result of planting too deeply.
Soil and fertilizer Soil types. Medium-textured soil of good depth and drainage is best for sweet corn. River bottoms most often provide these kinds of soils. Avoid shallow, ridge-top soils, sandy soils and heavy clay or gumbo soils. A soil analysis is essential for determining fertilizer needs.