Troubleshooting Brown Spots on Coral Cactus

Initial Assessment

Without a photo, a small brown patch could be normal, bruising, cold damage, or underwatering. Soft brown near the soil suggests rot from overwatering.

Recommended Adjustments

• Light: Move to the sunniest windowsill (direct sun most of the day).
• Water: In a 2‑inch pot, water thoroughly every 7–10 days—when soil surface feels dry.
• Pot: Keep in the small pot; do not repot.

Follow‑Up: Rapidly Expanding Dry Hole

The spot ate through the fleshy pad overnight, then dried. This indicates underwatering, not overwatering (unless the pot lacks drainage). Water as soon as the soil surface is dry. The hole won't heal, but further damage should stop with proper light and water.