This depends on your yard and climate, but here are some general guidelines. During normal watering season gear drives run about 30 minutes (less in shady areas), and sprayheads run about 8 to 10 minutes. During the hottest parts of summer the gear drives might increase to as much as 45 to 60 minutes, while the sprayheads will increase to 15 to 20 minutes. During the spring and fall you can probably water every 2 or 3 days. During the summer you should water every day for best results.