I use 20% worm castings, 20% ProMix/Sunshine, 20% Coco, 20% blackearth, the last 20% is cow compost, sea compost, organic 6-12-12 custom blended at a local Organic mill. Green sand Spanish River Carbonatite, and kelp fertilizer. Then I just water, I never replace the dirt and only top dress. Half way through flower I hit them with the 6-12-12 again. That's it. I pull the plants up roots and all and the hole that is left is where the new plant goes.