If there is a danger of cross pollination, a space of 40-50 feet may be needed as cross pollination can affect flavor. Sweet corn is a member of the grass family and needs considerably more nitrogen fertilizer than other garden plants. A of additional fertilizer sprinkled along the row every several weeks is important. Sweet corn needs regular watering as well because its sparse inefficient root system does not reach to deep soil water. Apply 1-1 inches of water per week.
Weed control is necessary, especially in young plantings.
Harvesting Sweet corn is ready for harvest when the juice in the kernel appears milky as you puncture a kernel with your finger. The ear should be well filled to the tip. This ideal harvest stage lasts for only a few days in hot weather, and regular checking for maturity is important. The silks of mature ears are generally completely dry and brown. Twist and pull the ear from the plant by bending the ear down sharply.