The following are some advantages and disadvantages for using lawn clippings as mulch. Based on your own knowldege and experience, feel free to add to this list.
- in steady supply during the mowing season (pro)
- rich in nitrogen, grass makes a good vegetable mulch (pro)
- must let them dry before using (con)
- spread them thin or dry grass clippings will mat if spread too thickly (con)
- never use grass clippings from a lawn that has been treated with herbicide (con)