Troubleshooting
Cabbage Fern problems — and how to fix them
Cabbage Fern (Aglaomorpha coronans) 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.
Brown frond tips
Usually caused by low humidity, fluoride in tap water, or overfertilising. Switch to rainwater and maintain humidity above 60%.
Root rot
Results from dense, waterlogged media. Repot into a chunkier epiphyte mix and reduce watering frequency.
Scale insects
Check the undersides of fronds regularly. Remove manually with a cotton swab dipped in isopropyl alcohol and treat with neem oil.
Pale, yellowing fronds
Often indicates insufficient light. Move to a brighter position with indirect light or add a grow light.
Frond drop in winter
Normal seasonal slowdown in low light and cool temperatures. Reduce watering and avoid drafts from heating vents.
Prevent cabbage fern problems before they start
Most cabbage fern issues are care-mismatch, not bad luck. Dial in the basics:
Cabbage Fern problems — FAQ
Why is my cabbage fern brown frond tips?
Usually caused by low humidity, fluoride in tap water, or overfertilising. Switch to rainwater and maintain humidity above 60%.
Why is my cabbage fern root rot?
Results from dense, waterlogged media. Repot into a chunkier epiphyte mix and reduce watering frequency.
Why is my cabbage fern scale insects?
Check the undersides of fronds regularly. Remove manually with a cotton swab dipped in isopropyl alcohol and treat with neem oil.
Why is my cabbage fern pale, yellowing fronds?
Often indicates insufficient light. Move to a brighter position with indirect light or add a grow light.
Why is my cabbage fern frond drop in winter?
Normal seasonal slowdown in low light and cool temperatures. Reduce watering and avoid drafts from heating vents.