Elymus repens
Plants
Matt Lavin from Bozeman, Montana, USA · cc_by_sa
About
Elymus repens, commonly known as couch grass, is a very common perennial species of grass native to most of Europe, Asia, the Arctic, and northwest Africa. It has been brought into other mild northern climates for forage or erosion control, but it often becomes invasive in the area.
Summary from Wikipedia
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Growing details and traits for Elymus repens in the Library.
No cultivars in the Library yet — the full profile above covers the species itself.