Spring and Fall tomatoes... What a concept!
Based on Marlingardener's recommendation, it sounds like you are right on schedule, Avonnow. Good luck!
My tomatoes are limping along... producing just enough for fresh eating but not enough to preserve -- perhaps too hot even here this year. I'll give them more compost -- just unearthed a new batch after turning the pile -- and hope they'll do better since our weather has cooled down some in the last couple of days (hovering between high 60's and low 70's overnight). Tough part is that THIS is when the harlequin and stink bugs usually start to explode (just starting to see juvies and ones and twos) so it is much better to have healthy plants that can withstand the onslaught.