Decomposed granite, is granitic rock that has weathered to the point that itreadily fractures into smaller pieces or chunks of weak rock. Further weathering produces rock that easily crumbles into mixtures of gravel, sand, and silt-sized particles with some clay. Eventually the gravel-sized particles may break down to produce a mixture of silica sand or silt particles and clay.
Decomposed granite, in a crushed stone form, is used as a pavement building material. It is used on driveways, garden walkways, Tennis courts and natural regional and national park ‘sidewalks’ and heavy-use paths. It can be installed and compacted to meet handicapped accessibility specifications and criteria. In agriculture and gardening, mulch is a protective cover placed over the soil to retain moisture, reduce erosion, provide nutrients, and suppressed weed growth and seed germination.
A variety of materials are used as mulch:
- Organic residues: grass clippings, leaves, hay, straw, kitchen scraps comfrey, shredded bark, whole bark nuggets, sawdust, shells, woodchips, shredded newspaper, cardboard, wool, but also animal manure, etc. Many of these materials also act as a direct composting system, such as the mulched clippings of a mulching lawn mower, or other organics applied as sheet composting.
- Rock and gravel can also be used as a mulch. In cooler climates the heat retained by rocks may extend the growing season.
Commonly available organic mulches include:
- Grass clippings.
- Peat moss,
- Wood chips
- Bark chips,
- Straw mulch or field hay or salt hay
- Cardboard or newspaper
We source this granite and mulch from our local quarry where loads can go from 3m2 to 50m2. Delivery is available at competitive prices.