I've haven't been growing long only 4 years, but I like starting seeds in happy frog then transplanting into bottom half ocean forest top half happy frog then final pots all ocean forest. This feeds for about 10 weeks.
Main Ingredients include: Worm Castings, Peat Moss, Perlite, Alfalfa Meal, Kelp Meal, Langbeinite, Bone Meal, Feather Meal and Crab Meal
Yea that stuff isn't soil, not saying it's bad just not soil.