Troubleshooting
Cardboard Cycad problems — and how to fix them
Cardboard Cycad (Encephalartos horridus) 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.
Rot from overwatering
This arid cycad rots quickly if kept moist. Use a mineral, fast-draining mix, water only when bone-dry, and keep it nearly dry in winter.
Severe spine hazard
The fronds bear hard, sharp recurved spines that readily pierce skin. Handle with heavy gloves and site it well away from children, pets and walkways.
Loss of blue colour
Insufficient light turns the prized blue fronds dull green and causes stretching. Give maximum direct sun to maintain the steely-blue colour and tight form.
Cycad scale
Encephalartos scale can lodge among the spiny fronds and is awkward to treat. Inspect carefully and apply horticultural oil early and repeatedly.
Prevent cardboard cycad problems before they start
Most cardboard cycad issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cardboard cycad in general rather than its problems? Read the full cardboard cycad care guide — light, water, soil and feeding.
Cardboard Cycad problems — FAQ
Why is my cardboard cycad rot from overwatering?
This arid cycad rots quickly if kept moist. Use a mineral, fast-draining mix, water only when bone-dry, and keep it nearly dry in winter.
Why is my cardboard cycad severe spine hazard?
The fronds bear hard, sharp recurved spines that readily pierce skin. Handle with heavy gloves and site it well away from children, pets and walkways.
Why is my cardboard cycad loss of blue colour?
Insufficient light turns the prized blue fronds dull green and causes stretching. Give maximum direct sun to maintain the steely-blue colour and tight form.
Why is my cardboard cycad cycad scale?
Encephalartos scale can lodge among the spiny fronds and is awkward to treat. Inspect carefully and apply horticultural oil early and repeatedly.