The Seed Starting soil is ridiculously lightweight itself, as after cutting it with 25-40% vermiculite, it is extremely well airated and well drained... water easily flows right out bottom hole.

It is a helpy bucket. Container with no drainage holes on bottom. drill a small hole 1-2 inches from bottom of container. This will create a reservoir for the roots to access at all times. 1 inch tall plant developed 12 inch long roots when I transplanted it today.

thnx for all the replies