Discocactus horstii Buining & Brederoo
Discocactus horstii is a small, solitary cactus with a radially segmented body, up to 2 inches (5 cm) tall with cephalium and up to 2.4 inches (6 cm) in diameter. The color of the epidermis is at first green and later dark red or brown. The cactus flower is large, nocturnal, deliciously fragrant, up to 3 inches (7.5 cm) long and up to 2.4 inches (6 cm) in diameter. The color of the fruit is white.
USDA hardiness zone 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
How to Grow and Care
Discocactus is probably one of the most difficult cacti to keep growing on its own roots and is almost always seen as a grafted plant. If growing on its own roots is attempted the soil must be extremely free draining and watering should only take place after the compost has dried out and then only on sunny and warm days.
Discocactus are tropical species, and should be kept warm in winter. The grafted plants are less cold sensitive, but none has any frost tolerance. Mature Discocactus stop growing, and instead divert their energy into growing a cephalium. The cephalium is a specialized flowering head, generally covered with fibers.
Discocactus will take full sun, but prefers a little shade in the afternoon. Water with extreme care after the compost has dried out… – See more at: How to Grow and Care for Discocactus
Native to Minas Gerais, Brazil at an altitude of about 3280 feet (1000 m).
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