I am starting my seeds on Sept 9th because I will be on vacation from August 25th to Sept 8th. Mine will be small seedlings though, about 5 weeks old, and will be in Jiffy peat seed starters, expandable type. I have 6 boxes of the 72 starter kits, so I will have several of most all my varieties.Plenty to go around.
Great link for seed starter mapping here:
http://www.tomatoville.com/showthread.php?t=3474 See post #7 by Feldon
I like it better than the little stick in labels which can get lost.
-Marsha