Troubleshooting
Hairy Gibbaeum problems — and how to fix them
Hairy Gibbaeum (Gibbaeum pubescens) 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.
Crown rot from water in leaf axils
The silvery hairs trap moisture between the leaf pairs. Water from above (e.g. rain or overhead irrigation) that sits in the crown will rot it quickly. Always water at the soil level and avoid any overhead wetting. If water accidentally enters the crown, use a dry cloth or bulb blower to remove it.
Root rot from summer watering
Hairy Gibbaeum enters summer dormancy as temperatures exceed 25°C. Any significant watering during this period causes rapid root rot. Keep completely dry from late May through September. The hairy covering helps the plant tolerate dryness; wrinkled leaves in summer are normal and do not require water.
Scale insects on stems
Brown, limpet-like scale insects can establish on the short stems between leaf pairs. Remove with a toothbrush or cotton bud dipped in isopropyl alcohol. Apply neem oil or a systemic insecticide at half strength if the infestation is widespread. Inspect regularly when new growth appears in autumn.
Prevent hairy gibbaeum problems before they start
Most hairy gibbaeum issues are care-mismatch, not bad luck. Dial in the basics:
Hairy Gibbaeum problems — FAQ
Why is my hairy gibbaeum crown rot from water in leaf axils?
The silvery hairs trap moisture between the leaf pairs. Water from above (e.g. rain or overhead irrigation) that sits in the crown will rot it quickly. Always water at the soil level and avoid any overhead wetting. If water accidentally enters the crown, use a dry cloth or bulb blower to remove it.
Why is my hairy gibbaeum root rot from summer watering?
Hairy Gibbaeum enters summer dormancy as temperatures exceed 25°C. Any significant watering during this period causes rapid root rot. Keep completely dry from late May through September. The hairy covering helps the plant tolerate dryness; wrinkled leaves in summer are normal and do not require water.
Why is my hairy gibbaeum scale insects on stems?
Brown, limpet-like scale insects can establish on the short stems between leaf pairs. Remove with a toothbrush or cotton bud dipped in isopropyl alcohol. Apply neem oil or a systemic insecticide at half strength if the infestation is widespread. Inspect regularly when new growth appears in autumn.