Help moderate soil temperatures. Aid in good root development by adding rich organic matter to the soils. Slow or eliminate weed growth. At least three to four inches of mulch should be maintained at all times around plants and trees. Replenish as often as you can, since organic matter decomposes over time.
Bagged products are easy to transport and handle and can be purchased almost everywhere.
Bulk products come in a variety of types. Even if many of the non-drought tolerant plants succumb to drought in a landscape, a thick layer of mulch can improve the landscape's appearance and improve the moisture holding capacity of any soil. Mulches will protect the soil and enrich it while we await the arrival of life giving rains. Extend mulch out to the dripline where possible. Proper application of nutrients assures healthy plants.