Troubleshooting
Sand Couch Grass problems — and how to fix them
Sand Couch Grass (Elymus farctus) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Invasive rhizome spread
The extensive rhizome network can invade adjacent planting areas; in non-dune gardens, root barriers or annual rhizome edging are needed to keep it contained.
Powdery mildew
In still, humid inland conditions, powdery mildew (Blumeria graminis) can coat the leaf blades; this is rarely a problem in the exposed coastal sites where the grass thrives naturally.
Prevent sand couch grass problems before they start
Most sand couch grass issues are care-mismatch, not bad luck. Dial in the basics:
Sand Couch Grass problems — FAQ
Why is my sand couch grass invasive rhizome spread?
The extensive rhizome network can invade adjacent planting areas; in non-dune gardens, root barriers or annual rhizome edging are needed to keep it contained.
Why is my sand couch grass powdery mildew?
In still, humid inland conditions, powdery mildew (Blumeria graminis) can coat the leaf blades; this is rarely a problem in the exposed coastal sites where the grass thrives naturally.