Use old newspapers as a natural weed killer or DIY garden mulch! Cover your flower or vegetable garden beds with several layers of old newspapers, layering the paper right up to the base of the plants you want to protect. Thoroughly soak the newspaper with water and cover with a thin layer of compost or mulch. The paper will smother the weeds, and it can be tilled into the soil when the season is over. While you’re at it, add a few handfuls of wet shredded newspaper to your compost heap to give earthworms a tasty treat.