Just a simple soil mix... organic potting soil, perlite, vermiculite, peat moss, blood meal, bone meal, and dolomite lime. They are currently in 5 gallon buckets and I transplanted them 3 times since seed using the same mix each time. Seems to be working well and giving them everything they need as they have only received plain water since sprouting. I used to use all the latest and greatest chemical nutes, but I like this way better. No mixing, no keeping track of feedings, no over-fert/under-fert worries, and its a whole lot cheaper and cleaner. I just add water and the soil does the rest. Now that they are in flower I add molasses to their water about once a week or so. Its my first time growing this way so we'll see how things turn out. They should be ready to harvest in about 5 or 6 weeks. No problems so far but harvest is still a long way off. lol