Brian I was face with the same decision about 6 weeks ago as my plot of premium perenial came up thick and lush but was full of grass. Premium perenial consists of brassicas, chicory and clovers which are all broadleaf so I opted to try a grass herbicide called poast plus. Now my plot looks much better and just yesterday I made a homemade wickapplicator to kill some of the grasses that were missed and the few taller weeds in the plot. At first I was real hesitant to try the poast but now Im glad I did as it worked quite well. Good luck!