The Unique Landscape of Las Cruces
Las Cruces sits at 3,901 feet in the Chihuahuan Desert, where roughly 9 inches of rain a year has to stretch across twelve months of intense sun. The sandy loam that covers most of the Mesilla Valley drains almost as fast as your drip line can deliver water, so bare soil around shrubs and trees dries out within a day or two of irrigating. A 3 inch mulch layer shades the surface, cuts evaporation dramatically, and keeps root zones from swinging between 110 degree afternoons and cool spring nights. Mulch also buffers the salt crust that builds up in Dona Ana County soils when irrigation water evaporates at the surface instead of soaking in. For Zone 8b yards planted with desert willow, Texas sage, pistache, and pecan, mulch is the single cheapest way to stretch every gallon of water you pay for.