Moon Cactus Black Spots: Rot Spreading to Offsets

Fundamental Issue

Moon cactus (Gymnocalycium graft) rotting – black spots, yellowing. Offsets (pups) on scion also affected.

Offsets Cannot Live Alone

Like the mother, they lack chlorophyll. They must be re-grafted to survive.

Re-grafting Guide

Cactus Collection FAQ has instructions. Complex, low success for beginners.

Reality

• Moon cacti inherently short-lived (1–3 years).
• Irradiation damage + graft stress = inevitable decline.
• Don't blame yourself.

Better Investment

Buy Echinopsis, Mammillaria, or Rebutia – colorful, long-lived, own roots.