I would think you would be fine. The article says it has iron and sulfur in it which is present in most of your fertilizers, and they don't hurt the micro organisms. Where you get into trouble with killing micro organisms is using insecticides or a soil fumigant, because that stuff has to be water or injected into the soil profile. these products just seems like it is sprayed onto the moss and not. The products should have a label, i would just read that and see what it says. From my thinking it sounds like its fine.