Nut Sedge can be killed, it takes years, with spray, but Quack Grass can be controlled better if you dig it out.
I have used systemic killer, but you then have to dig down and put it on the main Quack Grass root or it will kill anything it is spread on.
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The actuall main root, that sends out rhizomes, for established Quack Grass, can go way, way down in the soil.
I had one in the garden by the house, it was down over a foot; it ran along the foundation for over six feet.
If you have loose soil, like I did, very sandy, took a pointed sand shovel and rammed it down as far as I could and pushed up loosening the soil while pulling on the main root.
Along with the root, I would pull up sections of rhizomes, and new grass on those rhizomes, it was sending out willy nilly.
I have been fighting it in boulevard Day Lilly garden for years , so far a losing proposition. as if you do not sift the soil and get every single rhizome bit, it will be back worse than ever.
[/quote] I've stopped using weed killer an pesticide and gone organic , But luckily its not in spot where I would cultivate. I couldn't say how long its been here exactly or how it got started , but I dont think its native to my area . I never gave it much thought what it was until now . Thanks to you I now know what I'm dealing with .