ball cactus [5]

Under glass, grown in cactus compost in full or bright filtered light. From mid-spring to late summer, water moderately and apply a low nitrogen fertiliser every two months. Keep almost dry at other times. See houseplant cacti and succulent cultivation for further advice

No pruning required

Propagate by seed sown at 20°C in spring or summer

May be susceptible to mealybugs

Generally disease-free