Weed Killer "Pinner says: Spring is coming and this is the BEST Weed Spray. I made 3 gallons for around $4.00 last year after seeing a pin. Worked better than Round Up & killed the weeds/stray grass on first application. One gallon of APPLE CIDER VINEGAR, 1/2 c table salt, 1 tsp Dawn. Mix and pour into a smaller spray bottle. (you can purchase 3 gallon size Apple Cider Vinegar in the canning section of a good hardware store - cheap!)"