Organ pipe cactus is one of the most striking columnar species of the central and southern Sonoran Desert. Its range just enters southwestern Arizona, but most of the species is in Baja California and Sonora, Mexico. This beautiful species has relatively large white flowers and red fruits, whose sweet flavor earns the species its Mexican name of pitaya dulce, and the fruits commonly are sold along roadsides as a treat. We grow this species outside in Tucson, where it takes frost damage below about 20F. We offer seedlings that are in 4-inch pots.