Garden amendments and supplements seem as if they could benefit from being run through a vermicompost system. Things like bio-char, greensand, pearlite, peat moss, coco-choir, trace minerals could be picked up by the biology in the bin and perhaps be the best way to get these things to the roots of the plants. If vermicomposting increases the bio load of what we put into the bin, then the supplements would seem to increase the goodies held by that micro life we harvest. Perhaps they would not wash out of the soil as quickly. Or perhaps they would help the microbes by providing nutrition, habitat, or moisture balancing. Pro, Con, Discussion?