Allium Sphaerocephalon Set of 25 Bulbs Alliums are in the same family as garlic, onions, chives, and shallots. This makes gardeners wonder if they should include them in their ornamental gardening plans, as it conjures up images of supermarket produce. But because good garden designs are often made up of different shapes, Alliums rounded blooms make for high drama and interest in the garden.