Has anybody used mushroom manure for topdressing a lawn? I have a potential client who asked to have their lawn topdressed w/mushroom manure, but they did not know how thick they wanted it. I do not have any experience with this material - I know that most people topdress at approx. 1/2", but this is generally a mixture of several components (bark, compost, sand, etc.). Any information anyone could provide on this subject would be helpful.