Even though you have landscape fabric is no guarantee that dirt and seeds don’t end up on top and if the fabric was cheap thin stuff the gravel has probably cut holes in it exposing the soil underneath, I don’t imagine vinegar will hurt the fabric .

We once had some work done and they used landscape fabric. The weeds grow from the top into the fabric making weed pulling next to impossible. You cannot possibly use an implement. After that experience we NEVER use the cloth. You should be happy if the vinegar destroys the cloth.

Awesome comments....& thanks. I guess they saw me coming....told me that the reason the job was so expensive was because due to the expense of the INDUSTRIAL STRENGTH OF THE LANDSCAPE CLOTH! Even told me it came with a 20 year guarantee...which I've yet to see. Any thoughts on the stones? As you say, if the cloth is destroyed....oh well. But I'd hate to lose the gravel...even though some it's already discolored. Top photo shows original color (never dreamed I'd need a close up)...close up's of color changes are only 3 months later! So my questions are: Any idea why they're turning reddish/brown (in various locations around yard - sun, no sun, part shade, dry, damp, etc. Doesn't seem to make any difference. Also wondering if the vinegar will make them any worse. I'm really appreciating the feedback folks. Thank you!

NEW QUESTION: I'm reseeding my lawn & have been told to use burlap - to cover the entire area where the seed is laid. What's the trick to get it to lay flat? Also, I've learned over the years that one cannot use a sprinkler on the new seed, as puddles will inevitably form, relocating the seed. BUT, what about when the seed is covered with the burlap? Can I use the sprinkler to water it? I've got quite a large lot that's taking over an hour to water ... & I'm doing it twice a day. Any suggestions?