Comments: This plant dominates hundreds of square km of sandy valley floors and plains above approximately 5000 feet levation (Rhode, 2002). It is drought tolerant but cannot stand excessive sub-moisture. It grows on moderately shallow to deep, well-drained, sandy to silt loam soils of neutral to slightly alkaline reaction. It occurs on practically all range except meadows and at high elevations (USDA, 2010). Subspecies tridentata is the common sagebrush of deep, well-drained soils in the Great Basin of western North America, where it is often the dominant shrub of valleys and open grasslands. On drier sites and on high plateaus, it is replaced by subsp. wyomingensis, a taxon that appears to be increasing with prolonged droughts and disturbance from grazing. Subspecies parishii is found in coastal ranges in southern California and Baja California, and inland to areas south of the Great Basin. Subspecies vaseyana is the common sagebrush of mountain slopes and is the most abundant of all the subspecies of Artemisia tridentata. Subspecies wyomingensis is the common sagebrush of rocky or fine-grained soils from valleys to high plateaus in the Great Basin.
subspecies tridentata: Deep, well-drained (usually sandy) soils in valley bottoms, lower montane slopes, along drainages; 1300-2200 m
subspecies parishii: Loose sandy soils of valleys and foothills; 300-1800 m
subspecies vaseyana: Montane meadows, usually in rocky soils, sometimes in forested areas; 2000-2800 m
subspecies wyomingensis Rocky or fine-grained soils, cold-desert basins to high plateaus, foothills; 800-2200 m