Outsiders,
While I got outstanding production from the EarthTainers last season, I do consider the soiless potting mix to be somewhat of a "synthetic" growing environment.
My quest is to approximate the "organic" taste in my tomatoes by adding in ingredients like kelp, and others to make a "cocktail" supplement to achieve a facsimile of true in-ground growing.
This may take years of trial and error to achieve - - but I've got the time (and motivation). I'm just looking to suggestions from more experienced growers who have been through the process before.
Ray