The following are some advantages and disadvantages for using leaves as mulch. Based on your own knowldege and experience, feel free to add to this list.
- plentiful (pro)
- free (pro)
- looks and works better if partially ground and decomposed (pro)
- can blow away (con)
- can mat down when wet (con)
- matted leaves form a barrier that prevents air and moisture from getting to the soil below (con)