I have plantings along both sides of my driveway. I would like to put down some nice mulch and neaten the look but am not sure how to approach this 'job'. This is because I have many years worth of leaves and twigs layered there. Should I rake that cover all out(it is technically mulch though not aestetically pleasing like bought cypress or bark mulch) and apply the bought mulch. Or, just place bought on top of existing. I've done that before and some store bought mulch is mixed in the layers. The other thing is that leaves willfall in the autumn and start the layer process again. How would you approach this ?