MULTIPLIER ONIONS:
Plant multiplier or potato onions in the fall as you would garlic. Plant individual bulbs 6 inches apart in the row and at a depth that allows the very tip of the bulb to lie even with the surface of the soil. A few inches of mulch spread over the bulbs completes your planting. The following spring the onion will send up leaves. Be sure to remove any seed head that may want to form. Regular watering during the summer and well-drained, fertile soil will go a long way to producing larger bulbs. A planting of large individual bulbs can produce as many as 10-12 bulbs per plant. You can expect to harvest from July to August. Bulbs should be dried on racks or screens. Select and save the biggest and best bulbs for replanting in the fall. Store bulbs as you would globe onions, inside a mesh bag in a cool, dry location.