Troubleshooting
Normanbya Cycad problems — and how to fix them
Normanbya Cycad (Cycas normanbyana) 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.
Fungal leaf spot in high humidity
Brown or black circular spots on leaflets caused by Phoma or Pestalotiopsis fungi in stagnant, humid conditions; improve air circulation, avoid wetting fronds, and treat with a copper-based fungicide.
Cycad Aulacaspis scale
White armoured scale insects colonise fronds and trunks rapidly; treat with horticultural oil spray at 14-day intervals combined with a systemic soil drench of imidacloprid.
Frond sunburn
Direct summer sun bleaches and scorches the leaflets of this shade-adapted cycad; relocate to bright indirect light or provide 30–40% shade cloth protection during the hottest months.
Prevent normanbya cycad problems before they start
Most normanbya cycad issues are care-mismatch, not bad luck. Dial in the basics:
Looking for normanbya cycad in general rather than its problems? Read the full normanbya cycad care guide — light, water, soil and feeding.
Normanbya Cycad problems — FAQ
Why is my normanbya cycad fungal leaf spot in high humidity?
Brown or black circular spots on leaflets caused by Phoma or Pestalotiopsis fungi in stagnant, humid conditions; improve air circulation, avoid wetting fronds, and treat with a copper-based fungicide.
Why is my normanbya cycad cycad aulacaspis scale?
White armoured scale insects colonise fronds and trunks rapidly; treat with horticultural oil spray at 14-day intervals combined with a systemic soil drench of imidacloprid.
Why is my normanbya cycad frond sunburn?
Direct summer sun bleaches and scorches the leaflets of this shade-adapted cycad; relocate to bright indirect light or provide 30–40% shade cloth protection during the hottest months.