Couch grass, Agropyron repens (Syn. Elymus repens)
Traditional use: The decoction (strong tea) serves as a gentle diuretic and demulcent. Couch grass is most commonly used for urinary tract infections such as cystitis and urethritis. Couch grass is often combined with other similar herbs to help treat kidney stones, reducing the irritation and laceration they cause and preventing their further enlargement. Both an enlarged prostate and prostatitis will benefit from a couch grass decoction taken over the course of several months.