I hope you get a knowledgeable answer. I too would like to know. However, wouldn’t the acidic content wash away fairly soon? At the very least I think the first rain would dilute it. I have an area I want to get the growth all cut off, so I can later plant flowers. I just can’t keep up with trying to cut it back, and I’ve dug up some but that too is too much. Perhaps after the weekend we will get an answer.