Castle Cactus Corking: Normal Healing, Not Disease

Diagnosis: Corking (Healed Injury)

Brown bark-like patches = corking—normal healing of scratched/cut/damaged tissue. Not disease.

Source Investigation

• No pets? Check for accidental bumps, tool contact.
• Inspect closely with magnifier for tiny insects.
• If none: random mechanical damage.

Outcome

Will heal fully but remain brown. Green tissue won't return. No treatment needed—just don't worsen it.

Other cacti thriving confirms environment is sound.