Troubleshooting
Cycas Rumphii problems — and how to fix them
Cycas Rumphii (Cycas rumphii) 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 and caudex rot
Overwatering or poor drainage rots the trunk base; water sparingly and use a very gritty, free-draining mix.
Frost damage
No frost tolerance; even light freezes kill the foliage and can be fatal, so keep frost-free.
Scale and mealybugs
Cycads are magnets for armoured scale on fronds and crown; inspect regularly and treat promptly.
Manganese deficiency (frizzle-top)
New flushes emerge stunted and frizzled in poor or alkaline soil; correct with a cycad feed containing manganese.
Prevent cycas rumphii problems before they start
Most cycas rumphii issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cycas rumphii in general rather than its problems? Read the full cycas rumphii care guide — light, water, soil and feeding.
Cycas Rumphii problems — FAQ
Why is my cycas rumphii root and caudex rot?
Overwatering or poor drainage rots the trunk base; water sparingly and use a very gritty, free-draining mix.
Why is my cycas rumphii frost damage?
No frost tolerance; even light freezes kill the foliage and can be fatal, so keep frost-free.
Why is my cycas rumphii scale and mealybugs?
Cycads are magnets for armoured scale on fronds and crown; inspect regularly and treat promptly.
Why is my cycas rumphii manganese deficiency (frizzle-top)?
New flushes emerge stunted and frizzled in poor or alkaline soil; correct with a cycad feed containing manganese.