Troubleshooting
Old Man Eriosyce problems — and how to fix them
Old Man Eriosyce (Eriosyce senilis) 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.
Root rot
Overwatering in winter is the primary killer. The plant collapses at the base. Repot into fresh dry mix immediately and withhold water for several weeks.
Crown rot
Moisture trapped among the dense white spines can cause fungal rot at the growing tip. Water at the base only, not overhead, and ensure good airflow.
Spider mites
Fine webbing between spines is a tell-tale sign. Wipe down with a damp cloth and treat with dilute neem or an insecticidal soap solution.
Etiolation
Pale, stretched growth signals insufficient light. Gradually move to a brighter location and consider supplemental lighting in winter.
Failure to flower
A cool, dry winter rest of at least 8-10 weeks at 10-15°C is usually necessary to trigger spring and summer flowering.
Prevent old man eriosyce problems before they start
Most old man eriosyce issues are care-mismatch, not bad luck. Dial in the basics:
Old Man Eriosyce problems — FAQ
Why is my old man eriosyce root rot?
Overwatering in winter is the primary killer. The plant collapses at the base. Repot into fresh dry mix immediately and withhold water for several weeks.
Why is my old man eriosyce crown rot?
Moisture trapped among the dense white spines can cause fungal rot at the growing tip. Water at the base only, not overhead, and ensure good airflow.
Why is my old man eriosyce spider mites?
Fine webbing between spines is a tell-tale sign. Wipe down with a damp cloth and treat with dilute neem or an insecticidal soap solution.
Why is my old man eriosyce etiolation?
Pale, stretched growth signals insufficient light. Gradually move to a brighter location and consider supplemental lighting in winter.
Why is my old man eriosyce failure to flower?
A cool, dry winter rest of at least 8-10 weeks at 10-15°C is usually necessary to trigger spring and summer flowering.