QuestionsHow to growFlowersRock Garden FlowersProblem with Scutch Grass 0 Vote Up Vote Down Sheila Jacob asked 15 years ago Is it possible to rid a garden of Scutch Grass as it is growing and weaving it’s way through a layer of Mypex and Pink Granit. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Scutch grass can be killed with Roundup, applied as directed on the pack. It must not be allowed to drift onto other plants.