Saving a Totem Pole Cactus After Trauma and Rot

A 3–4 foot totem pole cactus (Lophocereus schottii monstrose) suffered a 1-inch-deep gouge near the base from a falling clock. A scab formed, but black rot and mold appeared after rainy weather. The plant is 15+ years old, originally from Arizona, now in Colorado.

Unpot immediately to assess root and basal rot. If roots are healthy, repot in fresh soilless mix. If rot has penetrated the base, cut above all infected tissue to healthy green/white, let callous 2+ weeks, and re-root in barely moist sand or perlite. Dust wounds with fungicide or rooting hormone. Keep completely dry during callousing and early rooting.

An inch-deep wound on a 4–5 inch stem is significant—structural stability may be compromised. Consider whether the remaining base can support the plant. A photo would help evaluate the damage.

Time is critical: rot spreads fast in humid conditions. Act now to save this long-time companion.