I don't have quackgrass but we do have Bermuda grass and it's a real pain here in my garden. I've tried everything and nothing works. all the ideas on the net sound good but this stuff is relentless. It's an invasive grass from Africa so drought and heat don't hurt it. you can solarize it but as soon as you move the plastic it's back within a week. It will climb up raised beds, on concrete, and in gravel. It spreads via runners, seeds, and roots if you don't have please don't plant it. I wish I could give some advice on the quackgrass but it looks like we all are facing an uphill battle with grass.
