Amateur question here: I need to put some fresh compost down on roadside flower beds at the end of a driveway and I am unsure if I need to remove the existing mulch from the beds before doing so. The surrounding ground is somewhat rocky and as a result, plants have not been growing as expected. Adding compost seems to be the next logical step to take, I just am unsure if it can be put on top of somewhat coarse mulch, or if the mulch should first be removed. Side note: the beds are currently empty and nothing will be planted in them until next spring. Thanks in advance!