How to prune onzuka bishop's cap

Any time, only if rot or dead tissue is evident. Use a sterile blade to remove only clearly dead or rotted tissue, cutting back to firm healthy flesh. Dust with powdered sulfur if fungal rot is suspected, and keep the plant in a dry, bright spot for one to two weeks.

Rarely — only when dead or rotted tissue appears. Onzuka Bishop's Cap is a collector's cactus that needs no pruning. Its star-shaped, spineless form is naturally symmetrical and slow-growing. Do not cut the ribs or body. Remove only dead or rotted tissue with a sterile blade. Wounds callous slowly — keep the plant dry afterward.

Use a sterile blade to remove only clearly dead or rotted tissue, cutting back to firm healthy flesh. Dust with powdered sulfur if fungal rot is suspected, and keep the plant in a dry, bright spot for one to two weeks.