Weed Control with Horticultural Vinegar Are you looking for a more “natural” way to kill unwanted grass and weeds? Fortunately, we have options! One method that has been around for years is using 20% Horticultural Vinegar as a “burn back” method to kill weeds. “Burn back” is exactly what it sounds like. The Vinegar “burns” back the leaves of the weed.  The vinegar is not translocated to the roots like the chemical methods of weed control, and it is likely that the weed will grow back from the roots again. [...]