How to prune pencil cactus (firestick)

Spring or early summer when growth is active and sap loss is less stressful. Make clean cuts at stem junctions using sterilised secateurs. Immediately rinse tools with water to prevent sap hardening. Wear nitrile gloves and eye protection throughout — even small sap contact causes burning irritation. Never burn pruned material as the smoke is also toxic.

As needed for size control — once a year at most for indoor specimens. Pencil Cactus can be lightly pruned to control its size or shape. Cut stems back to a junction or node using sharp, sterilised secateurs. WARNING: the white latex sap is highly toxic and a severe skin and eye irritant — wear nitrile gloves and eye protection, and keep it away from children and pets. Work outdoors or in ventilated space.

Make clean cuts at stem junctions using sterilised secateurs. Immediately rinse tools with water to prevent sap hardening. Wear nitrile gloves and eye protection throughout — even small sap contact causes burning irritation. Never burn pruned material as the smoke is also toxic.