Sulcorebutia
Origin
The genus *Sulcorebutia* , also known as dwarf cactus, belongs to the family Cactaceae. It originates from the Bolivian highlands, where it occurs at altitudes above 2500 m. *Sulcorebutia* species usually grow in a spherical shape, sometimes slightly flattened, singly or sprouting into small groups. The plants are known for their hardiness and their particularly bright flowers.
Appearance
Sulcorebutia are small, compact cacti with clearly defined ribs and fine spines, which are often arranged in a comb-like pattern. The spherical bodies usually reach only a few centimeters in diameter. The funnel-shaped flowers, which appear in vibrant colors such as violet, red, orange, or yellow, are striking. They usually open laterally from the outer areoles and form an impressive contrast to the darker epidermis of the plant.
Care
Location: Sulcorebutia need a bright, sunny spot. They tolerate direct sunlight well.
Substrate: A predominantly mineral, very permeable substrate is ideal, e.g. cactus soil with pumice, lava or sand.
Watering: Water moderately in summer and always wait until the substrate is completely dry. Avoid waterlogging at all costs. Do not water in winter.
Fertilizer: During the growing season, fertilize every 6-8 weeks with a special cactus fertilizer. Do not fertilize during the dormant period.
Summer/Winter: In summer, it should be bright but not too hot. Water sparingly. In winter, a cool dormancy period at about 8 °C is necessary to stimulate flowering the following year.
Popular species
Sulcorebutia rauschii: One of the best-known species with violet-colored bodies and vibrant pink to purple flowers.
Sulcorebutia arenacea: A small-growing species with light green bodies and striking orange flowers.
Sulcorebutia steinbachii: A variably colored species with reddish to violet bodies, which often grows in clusters and forms large inflorescences.
Note: Sulcorebutia are non-toxic to humans and animals. However, the plants should be handled with care due to their thorns.