Vinegar works on weeds because it burns or dries out the plant, making it difficult for the weeds to retain water. · yes , you can use vinegar as a diy weed-killing solution, but there are some things to consider. Because it’s a contact herbicide, it only kills the parts of the plant it touches. A vinegar weed killer is only effective in some circumstances, though, and should be used with caution. · if youve been looking for a non-synthetic way to kill weeds, you can make a vinegar weed killer or buy one. Vinegars acetic acid acts as a contact herbicide. · vinegar does not kill the roots of a plant. Does vinegar really kill weeds? · if you want a natural alternative for getting rid of weeds in your yard or garden, vinegar is the perfect option. In this article, we’ll explore how vinegar works as a weed killer, the best ways to use it, and share diy vinegar weed-killer recipes. The acids in vinegar kill whatever part of the weed it touches , and adding a couple of other household products makes it even more effective. · household vinegar contains acetic acid, which can effectively get rid of weeds. · vinegar is affordable, effective, and free of harmful chemicals, making it a popular alternative for weed control. Ahead, we explain how to make a vinegar weed killer —mixing in dish soap and salt—and how the solution works. The higher the acetic acid in the vinegar, though, the more effective it will be. The later category is the group of weeds that cause the most headaches. Heres what you need to know. Vinegar -based herbicides will only kill annual weeds, not perennials.