Rock or Mulch?
Rock and mulch are a matter of preference. Rock is initially more expensive because of the actual cost of the rock and the labor for installation. Keep in mind though that you won’t have to replenish the rock, whereas mulch needs to be replaced annually. Mulch is cheaper to place initially and mulch offers more benefits to the soil and overall health of the plants than rock. In the end it is a personal preference as there are a multitude of mulches and rock materials to choose from.