Pre Emergent Herbicide

[beeg]

I asked her if the dribble following her path contained roundup. She assured me it did not. To this day her path thru the lawn is as dead as one can imagine. Fjimp

HAHAHAHA Ya got a PIC of that MISTAKE YOU made.

[fjimp]

HAHAHAHA Ya got a PIC of that MISTAKE YOU made.

I know you would enjoy that. I can think of many things I would prefer to keep a record of. If I published that picture my bride would make my life miserable, regardless of whom received credit for the cause, no thanks.

[Ed in Tampa]

We use the strongest formula of Roundup we can find. This old house has the weed issues from h - - - -. This summer my wife went after the toughest of the weeds and when finished washed out the container prior to walking across the lawn to put the stuff away. I asked her if the dribble following her path contained roundup. She assured me it did not. To this day her path thru the lawn is as dead as one can imagine. Fjimp

You mentioned something I didn't think about. Most of this herbicide is systemic, meaning it absorbed into the vegetation and goes down to the roots and kills the plant. However to make things happen for most users who what to see immediate results they often put a chemical in that makes the plant wilt. I think what may be happening is your are spraying this but it is killing the plant before it get fully absorbed by the roots and since they are basically untouched the plant quickly comes back.
Roundup also makes a brush and tree killer, I believe it is designed to work slower so the actual vegetation killing chemical has time to reach the roots. It is not necessarily that much stronger (though it is usually full strength) it is just engineered to get down to the roots and kill them.

I would try that and see if that does not solve your problem.