Onions love the cool temperatures of spring in northern climates and fall weather in southern climates. While onions grow from seeds and bulbs, the green onion grows well from bulbs for short growing times. Spacing problems usually do not occur when planting green onion bulbs.
Plant green onion bulbs two weeks before the last known frost date or when daytime temperatures reach 45 degrees F. Choose a site that receives at least six hours of direct sunlight each day. Till the soil to a depth of about 8 inches and remove any rocks or soil clumps.
Dig a trench about ½ inch deep to plant the bulbs. Place them in the trench with the pointed end facing up.
Space the onions 1- to 2-inches apart as green onions need less room to grow than storage onions.
Cover the green onion bulbs with ½ inch of soil. Tamp the soil down around the bulbs to remove air pockets. Water the onion bulbs well.
Harvest the green onion bulbs as soon as they grow to desired maturity. Simply pull them from the ground with a gentle upward pull. Wash the green onions and store in the vegetable drawer of the refrigerator.