Owner asks cause and cure.
Greg: if soft = rot (fatal for barrel cactus). If hard = normal aging. Water only when soil dry.
Rescuing a Stress-Damaged Columnar Cactus After Relocation
Rehabilitating an Etiolated, Root-Poor Columnar Cactus
Removing Large Barrel Cacti: Free Sign or Nursery Buyback
Yellowing Golden Barrels After Record Rain
Golden Barrel Cactus Pups: Can Side Offsets Be Rooted?
Frozen Golden Barrel: Remove Dead Tissue After Frost Danger Passes
Reversing Desiccation in Pot-Bound Barrel Cacti
Barrel Cactus Shriveling at Apex
Tall Barrel Cactus Leaning: Shallow Roots Need Dirt, Not Potting Soil
Rescuing a Rotting Cactus: Base Rot Treatment and Propagation
Grafted Cactus Basal Rot: Top Scion Likely Lost Too
Golden Barrel Cactus (Echinocactus grusonii): Desert Globe of Gold
Miniature Barrel Cactus (Thelocactus setispinus): A Small, Floriferous Barrel with Bristly Spines
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