Rock & orangeman - I know I need to learn some patience, lol. Since they only took 1.5 liters, there was still plenty of moisture in the pots. Hopefully the high perlite content gives them enough aeration. I'll be sure to wait longer next time, it's just so hard not to DO something. Vertical growth had almost stopped for a few days, although the stalks were fattening up like crazy.

The main reason I added Superthrive was because I added a little more soil to get it right up to the seed leaves, and wanted to encourage root growth along that part of the stem. I've been using it on some of my outdoor non-pot plants, and it's amazing how they've taken off!

Thanks for the input, folks. It's nice to be able go through this with other growers.