Emergency Pruning for a Frost-Damaged Columnar Cactus

Immediate Action Required

The frozen, rotting top must be removed now—waiting risks spread of decay.

Step-by-Step

1. Sterilize a sharp knife (flame or alcohol).
2. Cut downward until only healthy green tissue remains—no black, orange, or brown discoloration in the vascular bundles.
3. Dust the cut surface with sulfur powder, rooting hormone, or charcoal powder.
4. If possible, move the plant indoors. If not, cover during frost but uncover daily for air circulation.
5. No water until March.

Local Resources

Contact Oregon's agricultural extension or a botanical garden for region-specific advice on frost protection and spring recovery.

You know what needs doing—act decisively and this cactus will recover.