If your garden is full of weeds that are choking out the plants you want, you can make a chemical-free weed killer from ingredients in your kitchen. Mix 1/2 cup salt and 4 cups of white vinegar in a spray bottle. Spritz the intruders being careful not to hit the flowers and plants you want to keep! The salt will kill the weeds while the vinegar makes the soil less hospitable for any new weeds.