Grass heads - this is SO awesome. 1.Spoon the grass seed into the stocking foot, and the potting soil on top of the seed. Tie a knot in the stocking, leaving the excess fabric hanging. Fill a yogurt container halfway with water and place the stocking head on top with the nylon tail in the water to serve as a wick. Attach googly eyes to the head and draw on a mouth with permanent marker.