Mesa sits at 1,326 feet across a broad Sonoran Desert plateau where sandy, alkaline soils drain fast and bake hard under relentless summer sun. With only 8 inches of annual rainfall, organic mulch is less a cosmetic choice and more a survival strategy, locking in moisture that would otherwise vanish within hours of irrigation. The native caliche and sand beneath Mesa neighborhoods tends to repel water and starve plant roots of nutrients, making amended soil deliveries a practical necessity rather than a luxury upgrade. Residents near the Mesa Arts Center corridor and throughout the sprawling east Valley communities of Gilbert and Chandler have found that pairing deep organic mulch with enriched planting soil gives desert-adapted trees and shrubs a genuine foothold in otherwise punishing ground. Decomposed granite and river cobble are equally popular here, blending naturally with the region's rocky desert aesthetic while cutting down on evaporation and weed pressure.