Troubleshooting
Old Man of the Andes problems — and how to fix them
Old Man of the Andes (Oreocereus celsianus) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Wet-cold root rot
Though cold-hardy, it rots if soil stays wet in winter. Keep it cold and dry over winter and use a sharply draining gritty mix year-round.
Thinning hair and etiolation
Too little light gives sparse wool and pale stretched stems. Provide full sun to maintain dense white hair and a compact, sturdy column.
Discoloured, matted wool
Dust, water spotting and pests dull the white hair. Avoid wetting the wool, keep airflow good, and clean gently if it becomes grubby.
Mealybugs concealed in hair
The dense wool shelters mealybugs from contact sprays. Inspect closely and treat with a systemic insecticide for reliable control.
Prevent old man of the andes problems before they start
Most old man of the andes issues are care-mismatch, not bad luck. Dial in the basics:
Looking for old man of the andes in general rather than its problems? Read the full old man of the andes care guide — light, water, soil and feeding.
Old Man of the Andes problems — FAQ
Why is my old man of the andes wet-cold root rot?
Though cold-hardy, it rots if soil stays wet in winter. Keep it cold and dry over winter and use a sharply draining gritty mix year-round.
Why is my old man of the andes thinning hair and etiolation?
Too little light gives sparse wool and pale stretched stems. Provide full sun to maintain dense white hair and a compact, sturdy column.
Why is my old man of the andes discoloured, matted wool?
Dust, water spotting and pests dull the white hair. Avoid wetting the wool, keep airflow good, and clean gently if it becomes grubby.
Why is my old man of the andes mealybugs concealed in hair?
The dense wool shelters mealybugs from contact sprays. Inspect closely and treat with a systemic insecticide for reliable control.