If you use vinegar to kill weeds, how long before the grass grows back

I had a bad experience! Not wanting to put chemicals on the carpet, my husband and I shampooed using vinegar in the shampoo machine. We dumped the dirty water in the back yard. Next day we had a huge circle of dead grass. We didn't want to go to all the work of digging up and replanting so we let nature take care of it. Finally had grass two years later. BEWARE!

After reading all the comments, and wanting to use something "greener" than an herbicide, I sprayed white vinegar and agricultural vinegar on weeds that had come up in the crushed granite we have in the backyard. A week later, when my handyman came to do some work, he commented that it looked like I'd fertilized the weeds!! They didn't even slow down their growth, so I returned to herbicides.

I prefer to use boiling water on weeds; reaction is pretty immediate, and you can replant within 30 minutes or so. How long before weeds return? Hard to say but I remove excess weeds 2-3 times this way per growing season. I think it not only kills existing weeds but also the seeds, spores, etc, while just pulling weeds does not. Boiling water also does not destroy beneficials as does toxic or salts. You must be careful not to treat the area of plants you wish to keep.

Use boiling water, and when the weeds are dead in 1-2 days, soak the areas with the hose. Wait 24 hrs, then pull the weeds, the'll come out by the roots. Guaranteed. Good Luck!

it won't grow back. You need to put new seeds and soil and keeps watering the seeds until it developed.

Vinegar did not work well for us.