Pulling up weeds from patios or driveways only for them to spring back after a few weeks can be frustrating, but this could be due to a common gardening error. Melissa J Will, also known as the Empress of Dirt, is an organic gardening guru who prides herself on sharing advice based on "science-based facts instead of folklore. She explained that many natural weed killers such as vinegar, salt and baking soda may be commonly suggested online but they only kill the leaves of weeds. They do not