Troubleshooting
Formosan Polypody problems — and how to fix them
Formosan Polypody (Polypodium formosanum) 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.
Frond tip browning
Low humidity is the primary cause. Raise ambient humidity to at least 55% with a pebble tray or humidifier. Also check for salt build-up from fertiliser; flush the mix with plain water if needed.
Rhizome rot
Burying the rhizome or overwatering in a dense mix causes rot. The rhizome should sit on or at the surface. If soft or darkened sections appear, cut them off cleanly and allow to dry before re-potting.
Pale, washed-out fronds
Indicates too much direct light or nutrient deficiency. Move to a shadier position and apply a dilute balanced fertiliser once monthly during growing season.
Prevent formosan polypody problems before they start
Most formosan polypody issues are care-mismatch, not bad luck. Dial in the basics:
Looking for formosan polypody in general rather than its problems? Read the full formosan polypody care guide — light, water, soil and feeding.
Formosan Polypody problems — FAQ
Why is my formosan polypody frond tip browning?
Low humidity is the primary cause. Raise ambient humidity to at least 55% with a pebble tray or humidifier. Also check for salt build-up from fertiliser; flush the mix with plain water if needed.
Why is my formosan polypody rhizome rot?
Burying the rhizome or overwatering in a dense mix causes rot. The rhizome should sit on or at the surface. If soft or darkened sections appear, cut them off cleanly and allow to dry before re-potting.
Why is my formosan polypody pale, washed-out fronds?
Indicates too much direct light or nutrient deficiency. Move to a shadier position and apply a dilute balanced fertiliser once monthly during growing season.