Aug 14, 2018· It's a sedimentary rock, which Campbell said feeds nutrients to the plant. Sand is the secret ingredient in a gravel garden. It acts as the irrigation system, retaining water for the plants.
A variety of materials can be used to create an area for sitting in the landscape; however, mulch such as bark nuggets and pine straw may not be durable. The use of gravel in the seating area provides a durable surface and can also add color, texture and visual appeal to the landscape.