Into what medium do you 'pot up' tomatoes?
I've started my tomato seedlings in some soil-less starter mix (Miracle Gro Seed Starter Mix, but next year I'm gonna try to find Pro Mix since everybody seems to like that) and they're doing fine. They're in inserts in 1020 trays, 32 cells per tray, under a T5HO light fixture.
In a few weeks I'll be transplanting them into larger individual pots. What do you use for that? Do you just use more of the same starter mix, or do you use heavier potting soil? I won't be putting the plants in the ground until mid to late April.