3 links have been added on this idea.
  1. Two major natural weed killers are salt and vinegar. Dish detergent mixed with vinegar or water also makes a good household weed-killer that is much gentler on the ecosystem than chemical sprays. Try mixing salt and water together in a spray bottle and spraying on weeds.

  2. Natural homemade weed killer recipe safe for use around pets and kids. Made with vinegar and dish soap, it kills weeds and unlike recipes that use salt it wont harm the soil in the process.