How to prune blue cereus

Late spring or early summer when the plant is actively growing. Cut damaged or dead stem sections cleanly with a sterile knife or pruning saw. Let the cut surface callous in a dry, shaded spot for several days before the wound is exposed to full sun.

Rarely — only when damage or disease is present. Blue Cereus rarely needs pruning. This columnar cactus grows as a single or multi-stemmed pillar — there is nothing to shape. Remove dead, diseased, or frost-damaged segments with a sterile, long-bladed knife. Wear thick gloves. Beyond that, leave it alone.

Cut damaged or dead stem sections cleanly with a sterile knife or pruning saw. Let the cut surface callous in a dry, shaded spot for several days before the wound is exposed to full sun.