Originally Posted by Goatman
Wood chips. Sometimes you can get them from a tree trimming service for free. I had a course on a farm I used to own that only required tees to be "remulched" once a year. Divots are easy to refill if you use plenty of chips at each tee.
FINE ground/chopped chips are the key. Almost sawdust like and even some hay around the perimeter to help aid any erosion issues.