quackgrass n European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed Usage(s) It is not a kill-all; quackgrass, for example, seems to be immune to it. Synonym(s) dog grass couch grass quack grass quick grass witch grass witchgrass Agropyron repens
News & Articles quackgrass Weed woes in Colorado: How to get control of evil quackgrass Few garden tasks are as gratifying as ripping out my nemesis, quackgrass, an aggressive perennial grass that spreads by seed and by rhizomes. April 4, 2014 - Denver Post