Granite rock naturally breaks down into 1/4-inch or smaller particles called decomposed granite. Loose decomposed granite packs well and provides excellent drainage, making it an ideal mulching material for garden beds, but it is susceptible to erosion and must be maintained often.
Here is a letter we got the other day at Rock N Dirt Yard about using crushed granite as a path through the backyard…. We're in planning mode for a new backyard. We'd like to have some sort of pathway around the perimeter of the yard to allow the kids to walk, run, bike/trike around.
Nigel's Paving Guide . Decomposed granite paths. Nigel used decomposed granite to create pathways that sweep around in a circular shape from the deck, then down the middle of the garden to the centre of the chook shed, where they branch off to the vegie garden and the potting area.