@Gaffle-
I would NOT dome a seedling. You can put a dome over a pot/cup until the seed germinates, but keeping them covered after they sprout is a bad idea, IMO. It is very easy to kill them that way and the tykes need air circulation.
RE watering: The first week, or so, is a balancing act. After that, I use the same drench/dry cycles I use for all plants. I just don't let them completely dry out until I'm confident they will take a short dry spell. Frequent spraying of water is not in the instructions and not a good idea.
@aruu-
I went throught the same question about amending large areas of soil for outdoor use. Apparently, when amending soil (whether using Doc's kit or anything else), recommendations only consider the top couple of inches of soil as compared to amending soil in pots where you amend the entire soil depth/volume. The idea is, you can't remove amendments but you will/can add over the years. In large areas, no one expects you to completely mix soil to a depth of 1-2 feet. The top layer will percolate down over time to "amend" the lower layers. I'm currently mixing soil (not HB) for a 2 foot depth. Whether that is a good idea remains to be seen...
That makes much more sense. I figured I was having to mix up amendments for a 1.5ft depth (height of my bed). Maybe i'll just mix peate moss and worm casings in the lower layer. Or maybe i'll buy 4 bales of promix on amazon...we shall see