Rebutia krainziana - 10 seeds (Krainz’ Crown Cactus)
Rebutia marsoneri is a small and very free flowering cactus, up to 3 inches (7.5 cm) tall and up to 3 inches (7.5 cm) in diameter. The spines are very thin, short bristle-like, flexible to somewhat stout, brownish to golden yellow to white, usually with dark tips, variable in length from 0.1 to 0.6 inches (3 to 15 mm) long and often inconspicuous. It develops a larger crop of flowers from the base of each head. The flowers are bright golden yellow to orange or orange-red, up to 2 inches (5 cm) long and up to 1.4 inches (3.5 cm) in diameter. It is usually one of the earliest Rebutias to flower in spring and has a very long lasting and continuous blooming period.
Rebutia thrive in bright light and range of conditions. Many species can be grown in partial shade to full sun. However, as these are mountain species, they do not appreciate high temperatures, which should be avoided. Throughout the growing season (spring and summer) let the potting soil almost completely dry out between waterings, then water thoroughly. In winter, cut back watering. Soil: A rich, fast-draining cactus mix is ideal. Fertilizer: During the growing season, fertilize with a cacti fertilizer mix. Suspend feeding during the dormant winter period.