Allow 12 to 18 inches between rows. To develop long, white stems for green onions, slightly hill the row with a hoe by pulling the loose soil toward the onions when the tops are 4 inches high. Do not hill onions that will be used as dry onions. Also, do not pull the soil from around the bulb and expose it to the sun. Hilling may cause the necks of the stored bulbs to rot.
Green onions become stronger in flavor with age and increasing size.
They may be used for cooking when they are too strong for eating raw. Remove any plants that have formed flower stalks and use immediately. They will not produce good bulbs for dry storage. Harvest in late June and early July when most of the tops have fallen over. Allow the plants to mature and the tops to fall over naturally.