How to Plant Perennial Multiplying Onions in the Fall
Perennial multiplying onions belong to the Allium cepa var. aggregatum group. This group has several varieties that are planted in the fall. Most gardeners plant spring bulbs, but fall-planting onions are a fun crop to plant after all your summer gardening chores are finished. When planting in the fall, you also have less diseases and pests to harm your onions.