Troubleshooting
Fiber Optic Grass problems — and how to fix them
Fiber Optic Grass (Isolepis cernua) 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.
Browning, crispy tips
The commonest complaint, caused by the soil or air drying out. Keep the roots constantly wet, stand the pot in water, and raise humidity to keep the threads green.
Brown, dead-looking centre
Older clumps die out in the middle, leaving a hollow ring. Divide and replant the healthy outer growth, or shear the whole plant back to encourage fresh shoots.
Floppy, sparse growth
Too little light makes the fine stems weak and lax. Move to a brighter spot with some direct morning sun to restore the dense fountaining habit.
Cold damage
Being tender it suffers below about 5°C and is killed by frost. Keep it indoors over winter in cold climates and away from cold draughts.
Prevent fiber optic grass problems before they start
Most fiber optic grass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for fiber optic grass in general rather than its problems? Read the full fiber optic grass care guide — light, water, soil and feeding.
Fiber Optic Grass problems — FAQ
Why is my fiber optic grass browning, crispy tips?
The commonest complaint, caused by the soil or air drying out. Keep the roots constantly wet, stand the pot in water, and raise humidity to keep the threads green.
Why is my fiber optic grass brown, dead-looking centre?
Older clumps die out in the middle, leaving a hollow ring. Divide and replant the healthy outer growth, or shear the whole plant back to encourage fresh shoots.
Why is my fiber optic grass floppy, sparse growth?
Too little light makes the fine stems weak and lax. Move to a brighter spot with some direct morning sun to restore the dense fountaining habit.
Why is my fiber optic grass cold damage?
Being tender it suffers below about 5°C and is killed by frost. Keep it indoors over winter in cold climates and away from cold draughts.