Light
Bright morning sun, some air flow, avoid touching the plant. Winter grower.
Growth rate
Slow to moderate
Light
They do need a lot of light to develop their typical compact shape, but different clones vary in their tolerance of full sunshine. However some protection in light shade is recommended during the hottest hours in summer. They can tolerate moderate shade, and a plant that has been growing in shade should be slowly hardened off before placing it in full sun as the plant will be severely scorched if moved too suddenly from shade into sun. If kept too dark they may become overly lush and greener and could be prone to rotting due to over watering.
Water
Water sparingly from March until October so long as the plant pot is allowed to drain and not sit in a tray of water (It rots easily, especially if over wet), and also needs to be avoided wetting the body of this plant while it is in sunlight. Let dry between watering. From July watering should be reduced to force the plant to go into a state of semi dormancy, by September onward the plant will begin to grow and watering should be increased gradually until late November when the plant should be in full growth.
Soil
fast draining potting mix like cactus mix
Fertiliser
Low food needs. Feeding may not be necessary at all if the compost is fresh then, feed in early autumn only if the plant hasn't been repotted recently. Do not feed the plants from September onward as this can cause lush growth which can be fatal during the darker cold months.
Hardiness
When dormant, the plant is slightly cold tolerant (down to nearly -5° C or less), but when left out it is more sensitive to frost. However warmth throughout the year will increase the grower's success (at minimum temperatures from 5 to 15 centigrade degrees during winter). During the summer it is best to keep the plants outside where the temperature can rise to over 30 C with no harm to the plant.