ball cactus [3]

Under glass, grow in a standard cactus compost in full or bright filtered light. From mid-spring to late summer, water moderately and apply a low nitrogen liquid fertiliser every 6-8 weeks. Keep barely moist at other times

No pruning required

Propagate by seed at 19-24°C (66-75 °F) in spring and summer

Vulnerable to mealybugs and, while flowering, aphids

Relatively disease resistant