Ha ha! I'm just in the process of doing this same thing with some Lavatera trimestris seeds I planted. They were old and had spent the summer baking in my greenhouse, so I soaked them all and planted them in a peat pot tray, with many seeds in each pot. Now when I tried to grow just a few last year, not one came up. This year? I think every seed germinated!
And of course, these aren't supposed to like being transplanted. So I emptied out one cell, teased them apart and potted them up a couple of days ago. I ended up with 8 plants from that one cell, and they all are looking fine so far.
Heh, anyone need a few white lavatera?