Water thoroughly whenever soil is dry, allowing cacti to partially wilt in between waterings. While drought tolerant, the torch cactus requires more water than other cacti, and should be properly doused when dry. In winter, however, do not water.Plant Echinopsis huascha in well-draining, fertile soil that has been mixed with sand and crushed stone, and maintain a pH between 6.1 and 7.8 for the best growth. At the same time, the torch cactus requires strong light for the best growth. Provide full sun outdoors, and as much direct light as possible indoors. During the winter, cacti should be moved to a cooler location, where the same level of light is maintained to prevent etiolated growth. The cold tolerance of this species is 25°F, USDA hardiness zones 9b to 11.
E. huascha can be propagated from softwood or hardwood cuttings, through seed, and offsets, which develop numerously from mature plants. With high humidity, proper light, and adequate nutrition, seeds germinate easily. However, flower color may not come true from seed, and some plants may be sterile.
