A sandbox is great when you have kids, but quickly becomes a weed patch once there are no kids around to play in the sand. Sand is a well-draining medium that, when properly supplemented, can produce stunning grass. So the next time you go outside and see your empty sandbox, consider growing some grass over the sand and enjoy a lush, green lawn.
Remove all debris and weeds from the sandbox.
Sprinkle one inch of peat moss over the entire surface and mix it into the sand with a rake.
Sprinkle the desired grass seed into the sandbox using a hand dispenser. For even growth, disperse half the seed in one direction and half in a perpendicular direction.
Roll and water roller over the entire sandbox to level and compact the sand and help the seed make better contact with the medium.
Water the sandbox every few hours to keep it completely moist until the grass sprouts. Then reduce the water to daily. Sand does not retain moisture, so it will require water daily. It is usually best to water in the morning so any excess water will evaporate during the day.
Wait at least eight weeks before mowing the grass so the root system becomes established enough to offer enough stability. If you mow sooner, you risk pulling up the grass.