Troubleshooting
Strictus Porcupine Grass problems — and how to fix them
Strictus Porcupine Grass (Miscanthus sinensis 'Strictus') 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.
Faded banding
The gold stripes are weak in shade and early-season cool; full sun and summer heat are needed to develop and hold them.
Some flopping in shade
Although stiffer than 'Zebrinus', it still leans in poor light or rich soil; site in full sun and feed sparingly.
Self-seeding / invasiveness
Can self-sow and is invasive in parts of the US; cut off spent plumes before seed disperses.
Hollow centre with age
Old clumps die out in the middle; lift and divide every few years to rejuvenate.
Prevent strictus porcupine grass problems before they start
Most strictus porcupine grass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for strictus porcupine grass in general rather than its problems? Read the full strictus porcupine grass care guide — light, water, soil and feeding.
Strictus Porcupine Grass problems — FAQ
Why is my strictus porcupine grass faded banding?
The gold stripes are weak in shade and early-season cool; full sun and summer heat are needed to develop and hold them.
Why is my strictus porcupine grass some flopping in shade?
Although stiffer than 'Zebrinus', it still leans in poor light or rich soil; site in full sun and feed sparingly.
Why is my strictus porcupine grass self-seeding / invasiveness?
Can self-sow and is invasive in parts of the US; cut off spent plumes before seed disperses.
Why is my strictus porcupine grass hollow centre with age?
Old clumps die out in the middle; lift and divide every few years to rejuvenate.