Lol, they are actually pretty neat and easy to grow and perennial. I mentioned on BYC I've always wanted them and BAM! a member sent me a bundle of actual plants! 28 or so of them. If you buy them from seed catalogs you can only get the top set onions and they I guess take a extra yr to get good production and they only ship them in the fall. Cost about a dollar a little bulb from what I can find, or around $13 for one ounce which is probably the same. Those plants I got with the bottom bulbs grew bonkers.
You can use the bottom bulbs, small onions about the size of shallots, plenty of green onions you can cut anytime without hurting them , then the top set onions about the size of pearl onions. And if you don't pick them the first set of top sets each four to six, seven on each top will all sprout and grow up another foot or so and top set again, and they all are good even the middle one's. When they grow like that they bend over and replant themselves (walking) I picked mine and replanted them myself. Perpetual onions a lot easier to grow than regular one's. They'll last decades.
My first top sets I replanted
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