You'd think a local nursery would know better but not the case. I've had better luck with onion transplants than sets and usually start seeds in Sept. for Jan. transplants. I'm late getting the seeds started but I'm going to start some anyway and hope they size up enough to get them into the ground by at least late Jan. I planted them into the garden on Feb.10 this year and still got some good sized onions by late May. I grow the Texas 1015y's a sweet one and Red Creole or Burgundy, the red ones are still keeping well 4 months later. Good luck with whatever you do grow.