Troubleshooting
Moudry Black Fountain Grass problems — and how to fix them
Moudry Black Fountain Grass (Pennisetum alopecuroides 'Moudry') 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.
Aggressive self-seeding
'Moudry' is notorious for prolific viable seed and abundant volunteers. Deadhead plumes before they shatter, especially near naturalised areas, to prevent unwanted spread.
Plumes hidden in foliage
The dark flowers can be partly obscured by the broad leaves and nod late in the season; site it where the clump is viewed from above or backlit.
Crown rot in wet winters
Soggy, poorly drained ground rots the crown. Improve drainage and keep mulch off the base over winter.
Late emergence
Breaks dormancy late as a warm-season grass; cut old foliage to the ground in early spring and wait for new shoots before judging survival.
Prevent moudry black fountain grass problems before they start
Most moudry black fountain grass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for moudry black fountain grass in general rather than its problems? Read the full moudry black fountain grass care guide — light, water, soil and feeding.
Moudry Black Fountain Grass problems — FAQ
Why is my moudry black fountain grass aggressive self-seeding?
'Moudry' is notorious for prolific viable seed and abundant volunteers. Deadhead plumes before they shatter, especially near naturalised areas, to prevent unwanted spread.
Why is my moudry black fountain grass plumes hidden in foliage?
The dark flowers can be partly obscured by the broad leaves and nod late in the season; site it where the clump is viewed from above or backlit.
Why is my moudry black fountain grass crown rot in wet winters?
Soggy, poorly drained ground rots the crown. Improve drainage and keep mulch off the base over winter.
Why is my moudry black fountain grass late emergence?
Breaks dormancy late as a warm-season grass; cut old foliage to the ground in early spring and wait for new shoots before judging survival.