Troubleshooting
Dyer's Cycad problems — and how to fix them
Dyer's Cycad (Encephalartos dyerianus) 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 from overwatering
The most common cultivation failure. Roots and the base of the caudex become mushy and foul-smelling. Remove all rotted tissue, dust cut surfaces with sulphur powder or a copper fungicide, dry for several days, and repot in fresh extremely gritty mix.
Cycad scale
Aulacaspis yasumatsui scale is devastating on Encephalartos. White encrustations appear on stems and leaf undersides. Treat aggressively with horticultural oil sprays (every 7–10 days for 4–6 weeks) plus a systemic imidacloprid soil drench for severe infestations.
Sun bleaching
Paradoxically, plants moved suddenly from shade to full sun can show leaf bleaching or necrotic patches. Always acclimatise over 2–4 weeks, progressively increasing sun exposure, even though this species ultimately wants full sun.
Prevent dyer's cycad problems before they start
Most dyer's cycad issues are care-mismatch, not bad luck. Dial in the basics:
Looking for dyer's cycad in general rather than its problems? Read the full dyer's cycad care guide — light, water, soil and feeding.
Dyer's Cycad problems — FAQ
Why is my dyer's cycad root rot from overwatering?
The most common cultivation failure. Roots and the base of the caudex become mushy and foul-smelling. Remove all rotted tissue, dust cut surfaces with sulphur powder or a copper fungicide, dry for several days, and repot in fresh extremely gritty mix.
Why is my dyer's cycad cycad scale?
Aulacaspis yasumatsui scale is devastating on Encephalartos. White encrustations appear on stems and leaf undersides. Treat aggressively with horticultural oil sprays (every 7–10 days for 4–6 weeks) plus a systemic imidacloprid soil drench for severe infestations.
Why is my dyer's cycad sun bleaching?
Paradoxically, plants moved suddenly from shade to full sun can show leaf bleaching or necrotic patches. Always acclimatise over 2–4 weeks, progressively increasing sun exposure, even though this species ultimately wants full sun.