Ghesh, my seedlings are slowgoing. I think I've detected what the problem is. Remember my wondertool - the soil block maker? I think I need to transplant earlier than I thought with those little blocks. I replanted about 15 tomatoes last night into reused pots and yogurt cups with holes poked in the bottom.
I had ordered the larger soil block maker thinking that I could make big blocks and put the little ones into it. I have changed my mind. First, it requires way too much soil. Second, it just didn't work correctly. I think I'm going to send it back.
I've learned quite a bit this year. I still really like the 2x2 block maker. It works best in a cardboard carton (like the ones that hold a case of beer) lined with plastic. The plastic keeps them from drying out too much. The ones that I put on old cookie trays dried out too much.
Keep on transplanting.