Troubleshooting
Cystopteris fragilis problems — and how to fix them
Cystopteris fragilis (Cystopteris fragilis) 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.
Summer dieback mistaken for death
Fronds naturally wither in dry heat; the rhizome is dormant, not dead. Keep the crown cool and lightly moist and it reflushes.
Crown rot
Heavy, waterlogged soil rots the brittle rhizome. Plant in gritty, sharply drained crevices and keep the neck of the plant above wet substrate.
Frond scorch
Direct sun or hot, dry air crisps the thin pinnae brown. Move to deeper shade and raise humidity.
Brittle frond breakage
Fronds snap easily when handled; site away from foot traffic and pets, and avoid disturbing established tufts.
Prevent cystopteris fragilis problems before they start
Most cystopteris fragilis issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cystopteris fragilis in general rather than its problems? Read the full cystopteris fragilis care guide — light, water, soil and feeding.
Cystopteris fragilis problems — FAQ
Why is my cystopteris fragilis summer dieback mistaken for death?
Fronds naturally wither in dry heat; the rhizome is dormant, not dead. Keep the crown cool and lightly moist and it reflushes.
Why is my cystopteris fragilis crown rot?
Heavy, waterlogged soil rots the brittle rhizome. Plant in gritty, sharply drained crevices and keep the neck of the plant above wet substrate.
Why is my cystopteris fragilis frond scorch?
Direct sun or hot, dry air crisps the thin pinnae brown. Move to deeper shade and raise humidity.
Why is my cystopteris fragilis brittle frond breakage?
Fronds snap easily when handled; site away from foot traffic and pets, and avoid disturbing established tufts.