How to prune samaipatensis cactus

Spring. Use a sterile sharp knife to sever stems cleanly at their point of origin. Dust cut surfaces with powdered sulfur or cinnamon. Allow severed pieces to callous in a dry, bright spot for 2–3 days before setting on dry cactus mix to root.

Rarely — only to remove damaged stems or thin heavy clusters. Cleistocactus samaipatensis is a clustering, trailing species that needs minimal pruning. Remove individual stems that have rotted or are overhanging awkwardly by cutting cleanly at the base in spring. Separated offsets callous quickly and root well. No routine heading-back or shaping is necessary for this naturally informal cactus.

Use a sterile sharp knife to sever stems cleanly at their point of origin. Dust cut surfaces with powdered sulfur or cinnamon. Allow severed pieces to callous in a dry, bright spot for 2–3 days before setting on dry cactus mix to root.