|I have a fairly steep slope on the south side of my yard. What type of mulch will stay in place the best?|
|I'd think in terms of an evergreen groundcover for a permanent solution to slowing or stopping soil erosion. If you simply want to mulch the area, you can use a heavy material such as 1-2" river rocks or bark nuggets. After installing the mulch, tamp it down with a lawn roller to make a dense layer that is somewhat interlocked. If you don't walk on the area, the mulch should stay in place.
Good luck with your landscape.