Soil: Use a very a particularly draining substratum, as it is very sensitive to rotting. Let the soil dry out between waterings. Repotting: Repot in the spring, when their roots become cramped. Generally, they should be repotted every other year in order to provide fresh soil. After repotting, do not water for a week or more. Needs a large pot to accommodate a large root system.
Water: In summer, during the vegetative period, it must be regularly watered, but allowing the substratum to completely dry up before irrigating again (but do not overwater). In winter, it’s to be kept dry. Preferable not to water on overcast days, humid days or cold winter days. Hardiness: It is a quite frost resistant cactus, hardy to -5° C (- 10° C if very dry). However, in cultivation it is better not to expose it to temperatures lower than 0° C. Exposure: Outside full sun or afternoon shade, inside needs bright light, and some direct sun. But does not care for extremely high temperatures in summer
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz
