Vinegar and Salt Ratio. Add 1 lb. of salt to 1 gallon of 5 percentvinegar. Mix the two ingredients thoroughly until the salt dissolves. Add 1 tbsp. of dish detergent, which acts as a surfactant, breaking the surface tension of the water solution to cover the weed completely.
Full recipe here: https://www.craftylittlegnome.com/permanently-kill-grass-weeds/
If you added 1/2 to 1 cup salt to a gallon of vinegar that should do the trick.
Hi Barbara - The struggle is real, isn't it?!? This is the most effective all-natural weed killer DIY that we use. It's even been featured on Hometalk! Hope this helps! Hugs, Holly
PS - We have a FREE eBook with recipes for all of my homemade and all-natural cleaners. You can download it here --> https://pinkfortitude.com/thank#GreenClean