Rebutias are a group of about 20 species of small desert cacti that form many offsets. Their spines are weak and flexible. Their special attraction is that they are showy with highly colored funnel-shaped flowers produced in late Spring and early Summer. Flowers open in the morning and close in late afternoon, each one lasting for 2 to 3 days.
During the active growth period, water moderately enough to make the potting mixture moist throughout at each watering. During the Winter rest period give only enough water to prevent the potting mixture from drying out completely.
For Rebutias grown in soil-based mixture, use a high potash tomato-type fertilizer once every 4 weeks during the active growth period only. For Rebutias grown in peat-based mixture use same fertilizer, but apply it once every 2 weeks during active growth period.
Re-pot every year in next size pot until 5 inches pot is reached. While working fold newspaper around it, to protect plant and fingers.
Remove offsets in late Spring to early Summer and plant in cactus and succulent compost. Sow seeds in Spring.
Do not subject Rebutias to long periods of intense Summer sunlight. During the rest of the year, however give them as much direct sunlight as possible. They will not thrive if they are placed in shade.
Spray plant once a month to keep dust-free.
All Rebutias are susceptible to red spider mite and if skin begins to turn brown all over, this is usually a sign that the pest is present.
Rebutia can be displayed on a windowsill on its own or in an arrangement or in a conservatory.
Cactus and succulent compost.
The smallest flower in the world comes from the Wolffia plant; commonly called watermeal, this plant is native to many parts of the world and has up to 11 different species.