Vinegar is a common household product that can be used as an environmentally friendly weed killer. Vinegar contains acetic acid, which lowers the pH of the soil to prevent weeds from growing. Saturating the soil as well as the plant itself with a basic vinegar and citric acid solution will destroy current and potential weed growth. This organic recipe should be used in sunny, dry weather and can be reapplied as necessary.
Combine 5 oz. of lemon juice with 1 qt. of white vinegar in an empty plastic spray bottle.
Mix solution well.
Spray citric acid and white vinegar solution directly onto weeds to kill the plant.
Saturate the soil with the solution to prevent future weed growth.