These plants, reaching 10 feet in height, stand on high mountains like snowy sentinels overlooking valleys. It is believed that the white hairs provide protection from the intense ultraviolet light of the higher altitudes. Excellent as landscape or patio plant. In cultivation, Oreocereus requires bright light to produce dense hairs, but, as a former mountain dweller, does not care for extremely high temperatures. Prefers porous cactus soil with adequate drainage. Bright light to full sun with ample airflow. Preferable not to water on overcast days, humid days or cold winter days. Protect from frost.