Gymnocalycium ragonesei - 10 seeds
Gymnocacalycium ragonesei is a very small, slowly growing (usually) solitary cactus.
Stem: Dark grayish-brown to olive coloured epidermis, flattened, up to 7.5 cm in diameter.
Spines: Short pale spines flattened against cacti (rarely sticking out - easy cactus to handle)
Flowers: Creamy-white with a reddish throat, up to 5 cm. long, 4.5cm. diameter.
Blooming season: Flowers are produced in late spring and remain open for up to twelve days.
Cultivation: This Gymnocalycium is supposed to be one of the most difficult species in cultivation, and very slow to get to a reasonable size. It will offset after a considerable period of time. It is a summer growing species that needs regular water in summer (but do not over-water ). Keep rather dry in winter. This plant does not like extremely bright situations. Give it some shade during the hottest part of the day. Keep this plant in a low PH compost; otherwise growth will stop altogether. Feed it with a high potassium fertilizer in summer. It is quite frost resistant if kept dry (hardy to -5° C)