I just went back to dirt after a couple of years playing with other methods. I'm having the best grow I've had in a long time. I'm using Fafard Premium Potting Soil. It has a few nutes, but it's mild. I don't feed at all until wk 6, when they seem to run out of the trace type nutrients, like cal, mag, phos. Usually just one or two feeds, they're usually just in12/12to flower at wk 5 or so. I've been using Jack's Plant Food; they make a 20-20-20, 15-30-15, and 10-30-20. I don't use much, 1/4 teaspoon per gal. when I do use it. Anyway, the results from the Fafard are impressive, and I've done quite a bit of dirt growing over the yrs (I'm 60). By the way, I'm paying $5.99 for a 16 qt bag, so I spend about $7.50-$9.00 each over the life of the plant.