How to prune fairy castle cactus

Only if damage or disease occurs — no seasonal pruning needed. If a column is damaged or rotten, use a clean, sterilised knife to cut it off at the base. Allow the cut surface to callous in a dry spot for several days before any contact with soil.

Rarely — only when damaged or diseased. Fairy castle cactus (Acanthocereus tetragonus 'Fairy Castle') needs no routine pruning. It is a slow-growing columnar cactus — its branched, turret-like form develops naturally without any cutting. Only remove a stem if it is diseased or damaged, cutting it cleanly at the base with a sterilised blade.

If a column is damaged or rotten, use a clean, sterilised knife to cut it off at the base. Allow the cut surface to callous in a dry spot for several days before any contact with soil.