I think your timing is about right, LP. If I were going to try again, I should be starting now....but at the rate I mold-kill baby plants, I decided to just wait and direct sow.
All the seeds are perennials, so even if they get a slow start, they'll catch up next year...
Are you going to start them in trays? Peat pots? Peat buttons? If you find a method that is foolproof, pls remember to tell me.