Here's recipe for weed killer that has the power of Roundup for a fraction of the price. Mix two cups ordinary table salt into one gallon of white vinegar that has five percent acidity. Add eight drops liquid dish washing soap. Label and keep out of reach of children. This is not toxic, but it will kill any and all vegetation, even the good stuff, so be careful where you spray it. Another caution: Spraying this multiple times in the same area will sterilize the soil so that nothing will grow there for a long time. It is ideal for killing weeds that grow between cracks in your sidewalk and other areas where you don't want vegetation.