One of the easiest nontoxic methods for removing weeds from the garden is using boiling water. Simply pour boiling water on paths and pavement to immediately kill the weeds. Note: Be careful not to splash any boiling water on the plants you want to keep!
Create an effective weed killing solution by mixing one part baking soda with two parts vinegar. You can also add in lemon juice if you have particularly stubborn weeds. Note: This mixture is best for young or annual weeds in paved areas.Solutions: DIY Non-Toxic Weedkillers – Chemical Free Life