I have an area outside my landscape bed where I laid a six inch wide layer of decomposed granite to keep the weeds out of the beds. This works quite well, but does get some grass growing in it from the yard. I spray the decomposed granite with the 20 % vinegar mix. This is my question: Is it necessary for the green weeds or grass to be sprayed or does it do any good to spray all of the granite while I'm at it or am I just wasting my time and money?
I wasn't really asking if it would do anything for the granite, I was wondering if it would seep through the granite to the ground beneath it and somehow stop any weeds that would be germinating at the time.
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