Troubleshooting
Pink Muhly Grass problems — and how to fix them
Pink Muhly Grass (Muhlenbergia capillaris) 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.
Few or no flowers
Insufficient sun is the primary cause. Also check for over-fertilising (too much nitrogen). Ensure at least 6-8 hours of full sun.
Crown rot in wet winters
The main failure cause in cold, wet climates. Ensure excellent drainage; plant on a slight mound in clay soils. In zone 5-6, cut back and mulch before hard frost.
Floppy growth
Rich soil or shade causes open, arching stems. Grow in lean soil in full sun.
Slug damage in spring
Emerging shoots in cool, wet springs are susceptible. Apply organic slug pellets around the base.
Winter hardiness at the limit
In zones 5-6 a thick mulch of bark or straw after cutting back provides helpful protection during severe winters.
Prevent pink muhly grass problems before they start
Most pink muhly grass issues are care-mismatch, not bad luck. Dial in the basics:
Pink Muhly Grass problems — FAQ
Why is my pink muhly grass few or no flowers?
Insufficient sun is the primary cause. Also check for over-fertilising (too much nitrogen). Ensure at least 6-8 hours of full sun.
Why is my pink muhly grass crown rot in wet winters?
The main failure cause in cold, wet climates. Ensure excellent drainage; plant on a slight mound in clay soils. In zone 5-6, cut back and mulch before hard frost.
Why is my pink muhly grass floppy growth?
Rich soil or shade causes open, arching stems. Grow in lean soil in full sun.
Why is my pink muhly grass slug damage in spring?
Emerging shoots in cool, wet springs are susceptible. Apply organic slug pellets around the base.
Why is my pink muhly grass winter hardiness at the limit?
In zones 5-6 a thick mulch of bark or straw after cutting back provides helpful protection during severe winters.