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Barrel Cactus Shriveling at Apex

Top-Down Shriveling on Potted Barrel Cacti

Two of three barrel cacti (3 ft and slightly shorter) shriveling and blackening at top.

Causes

  • Cold damage (delayed appearance).
  • Sunburn from sudden outdoor exposure.
  • Overwatering (rot from inside—usually fatal).

General Rule

Water only when soil dry. Acclimate to sun gradually.

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