Roundup is absorbed by green plants, taken to the bottom of the root, and kills the plant from the bottom up, affecting the whole plant.
(More or less - probably not a scientifically correct explanation, but round about how it works....)
That is what makes Roundup so good - many other weed killers just burn off the top green bits of a plant, but don't affect the root, or some such.
Anyhow, you can spray bare ground over seeds, or hard tough bark coverings, or so forth all you want and not hurt plants.
But, get a little on the green part of the plant, and it will translocate to the root and start killing.
In an old established patch, your plants probably would have enough root mass to work through the roundup. Be hurt, but could get through a very light dose.
In your case, a pretty new patch, you mighta done more harm than good. A light wiff will still translocate and start working on pretty young roots.....
As mentioned, probably first know next June or so for sure.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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