I used mossy bits, lots of them. Total failure on the first attempt, there were so many of the things in the soil mix that they killed seedlings in a few days. I dug one of the failing seedlings up to see what was up, and the little roots were surrounded by larvae. Mossy bits dissolved in irrigation water kept a lid on the buggers the second time, but I am not going back. Coco seems to fit my personality better. Different strokes eh, there are a lot of ways to grow weed, the key is to learn one of them. One of these days, I may get there.