Echinofossulocactus phyllacanthus v. violaciflora

Easy to care and flower. No absolute schedule can be given for watering as various factors (Soil mixture, containers, drainage, temperature, size of plant) influence water use, so - as a general rule - the soil should be thoroughly wetted at each watering during the active growing season (spring and summer), water when the top 1.5- 2 cm of soil feels dry to the finger. Do not soak the soil during the dormant period. Make sure there is good air circulation between plants. Good drainage is essential. Requires bright sunlight to grow well. Dormant plants do best at temperatures from 5-10°C (but will tolerate -5°C for short periods). The cooler temperatures develop sturdier plants and encourage the formation of flower buds.   Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz