Troubleshooting
Purple Fountain Grass problems — and how to fix them
Purple Fountain Grass (Pennisetum setaceum 'Rubrum') 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.
Frost death
Even a light frost kills the top growth and the plant rarely survives cold winters; lift and overwinter indoors or treat as an annual.
Green, dull foliage
Insufficient sun fades the purple colour and reduces flowering; move to the brightest possible spot.
Container dry-out
Pot-grown plants wilt fast in heat; check moisture daily in summer and water before the mix fully dries.
Crown rot
Cold, soggy soil rots this heat-loving grass; ensure excellent drainage and avoid overwatering in cool weather.
Prevent purple fountain grass problems before they start
Most purple fountain grass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for purple fountain grass in general rather than its problems? Read the full purple fountain grass care guide — light, water, soil and feeding.
Purple Fountain Grass problems — FAQ
Why is my purple fountain grass frost death?
Even a light frost kills the top growth and the plant rarely survives cold winters; lift and overwinter indoors or treat as an annual.
Why is my purple fountain grass green, dull foliage?
Insufficient sun fades the purple colour and reduces flowering; move to the brightest possible spot.
Why is my purple fountain grass container dry-out?
Pot-grown plants wilt fast in heat; check moisture daily in summer and water before the mix fully dries.
Why is my purple fountain grass crown rot?
Cold, soggy soil rots this heat-loving grass; ensure excellent drainage and avoid overwatering in cool weather.