Are you looking for a safe way to keep weeds and grasses from growing in the cracks of your driveway, sidewalk, walkway and paving stones? Try this: Sprinkle handfuls of baking soda onto the concrete and then sweep it into the cracks where the weed s are or wherever you want to prevent them from growing. The added sodium will make the area much less hospitable to dandelions and their friends. To purchase...