have a customer who has a very shady back yard. it has lots of moss. although i have given my opinion on how to correct the problem, he doesnt want to spend the dough. last year was the first year we mulched the leaves in his back yard. we did this: go over the leaves(oak) many times with doubles on. blow the scraps into a pile, and dump elsewhere. this was good enough to the naked eye, but did leave quite a bit of leaf dust. this past summer, the moss seemed to get worse. he claims its cus the way we cleaned the leaves. what do u think?