I ended up with well over 600 plants in 4" pots to set out last year. But I start mine in small individual cells in the GH and move them up after they germinate. That's partly because I refuse to give space to seeds that don't germinate. Mostly annuals, and I found places to put most of them! It's hard for me to wintersow, because I have no place to put the jugs; but I'm going to try to find places to put a few this year. If we ever see the ground again, that is!