I mixed my 5 gallon buckets with about 1/7th perlite at the bottom, 4/7th compost(2cft organic soil, 1/2cft organic store bought worm casting, 2 cups kelp meal, 1 1/2 cup alfalfa meal, 1/2 cup dolomite, 2 tbsp azomite dust), 2/7th store bought organic topsoil with a 2 inch layer of mulch that is...