The Unique Landscape of Cottonwood
Cottonwood sits in the southern Redding basin where summer stretches long and hot, and beds without mulch bake dry by early July. With only about 24 inches of rain a year, nearly all of it falling between November and March, mulch is the single best tool for holding onto winter moisture through a rainless June, July, and August. The local clay loam also crusts and cracks when exposed to direct sun, which breaks feeder roots near the surface. A steady mulch layer buffers that soil temperature swing and keeps the top few inches workable. In Zone 9a, where plants rarely go fully dormant, that root protection matters nearly year round. Mulch also slows the winter weed flush that follows the first real storms in November and December.