Technically, the onion starts you get in the store are just that, onions started the prior year but the trouble with them is they never get terribly big before that go to seed. I'd just use them this year but I prefer seed starting my onions in the late winter.Quick question for people who grow bulb onions.... If you harvest your onions and discover some that are very small (walnut sized), what do you do with them? Replant them again?