One of the best things you can do for your landscape is to use compost. Mulching a landscape refers to covering exposed soil with inert materials. It can help plants grow, reduce weeding labor, save water and make a garden area look cleaner and more decorative.
By spreading over and tilling in the bare soil with compost you create a buffering layer. That layer will help insulate plant roots from radical temperature changes. It also keeps moisture from evaporating fast so you can reduce the water needs of your plants. That same buffer zone will make it harder for weeds to germinate and using wood chips or pecan shells to fill in the empty spaces will make the landscape more attractive.

A cubic yard of compost weighs approximately 900 lbs = about 0.45 tons.

1 Cu.Yd.
Tucson's Best Organic Compost
TBOC Tank's Green Stuff™ is "Tucson’s Best Organic Compost". It's ASCO Verified for use in organic agriculture, containing a balance of 30/70% of organic dairy manure and controlled plant waste resulting in a rich, highly nutritious, moisture holding, porous material. It is composted to 130 degree for 30 days until it is a well cured, finished compost with no continued decomposition and no odor. TBOC is supplemented with Bactifeed, a biologic additive providing the microbes that help composting. Bactifeed is certified organic by GOCA, CCOF, and ICS. It has a Carbon to Nitrogen ratio of 18:1 and a Carbon to Phosphorus ratio of 77:1.
Native Compost
NCOMP This "happening" compost is a composition of green waste materials from the Phoenix valley. Green waste materials are recycled organic plant materials that include grass, leaves, bark, sawdust, and shrub trimmings. Gypsum is added to improve heavy soil structure, help break up caliche, remove sodium from saline soils, and act as a gen-eral soil conditioner. Native Compost is a humus-like soil booster that provides the correct balance of nutrition, organic matter, and particularly active bacteria that are vital to soil nutrition.$30.00
White Mountain Compost
WMCOMP A natural forest mulch sourced from the Snowflake area in the White Mountains. It is a natural non recycled pine mulch compost with excellent water-holding capacity. WMCOMP provides soil with high value nutrients such as calcium, magnesium, potassium and phosphate. With a low pH of 6.1, it blends well with our alkaline soils and makes an excellent soil additive here in the Tucson valley. Limited quantities available.
Golf Course Omni Compost
GCOMNI A blend consisting of five separate vegetative and woody elements. It is double screened at 1/8” minus to remove any twigs and wood chips for a smooth and even layer. GCOMNI is a great source of nitrogen and other nutrients essential for growing plants and is our premium compost solution for soil prep, over-seeding, and grass planting. (a Sod Blend is available made with this product see Topsoil)$49.00
Pine Mulch
PMULCH A finely screened ¼” pine wood mulch that is primarily used as as an insulating layer of organic material spread out on top of soil. Pine Mulch blankets topsoil to conserve moisture and can maintain a more even topsoil temperature. In thick enough layers it can be used to prevent weed growth. Pine Mulch can also be used in a decorative manner, giving plant beds a neat, landscaped appearance.$25.00
Manure Mulch Blend
MMB Manure Mulch Blend is a high quality lawn top dressing and over-seeding fertilizer made from 50% Pine Mulch and 50% Steer Manure. The high nitrogen content in Steer Manure helps keep grass seed warm and promotes germination during the cool fall nights. MMB provides the warmth and nutrients of steer manure and the moisture retention of the pine mulch.$32.00

“Take care of your garden, and it will take care of you”  unknown author