Sow indoors in flats with good potting soil February to July. Transplant into the garden April to August, when plants are at least the size of a pencil lead. Space 1” in rows that are 1’ apart. Onions benefit from frequent watering and shallow cultivation. Harvest when they are the size you want to eat.
To save seed, leave at least 20 plants in the ground to flower the second spring. Beautiful globe-shaped flowers attract pollinators. Isolate from other green onions by ½ mile.