Similar to shallots, as they divide into clusters. Why are they called "potato onions"? I've wondered that myself. When harvesting, though, I noticed that the bulbs were clustered underneath each other like a hill of potatoes. Another allium with great storage qualities well into June or July. Flavor is strong and smooth; not as pungent as Stuttgarter. Clusters of 10-12 bulbs have a large size range from ½" to 3". Approx. 15-20 sets per pound. Spring Ship. Organic.