genus which has a few dozen species of cactaceae, globose or briefly columnar, originating in South America; the genus is also called Eryosice. They have dark green or greyish green stems with showy clear or brown spines; they are generally small in size, and most of the species have very slow growth; adult plants can reach 10-12 cm in diameter. In late spring or in summer they produce small red or pinkish flowers, sometimes cream. After flowering they produce small, long-stemmed fruits, containing some small dark seeds.
Display and watering
Exposure: cultivate in a sunny place, even for many hours a day; they do not tolerate frost, so in winter it is good to store them in the house, or in a tempered greenhouse, where the temperature does not drop below 5 ° C.
Watering: from April to October, water weekly, always waiting for the substratum to be dry between one watering and the other. During the winter months avoid watering specimens that are left in a cold place, the plants in the apartment should be watered only sporadically, leaving the soil mainly dry. During the vegetative period, provide specific fertilizer for succulent plants, mixed with the irrigating water, every 15-20 days.