Connect to your Spruce Irrigation Controller from anywhere in the world to monitor and control your yard. Spruce uses weather data and advanced watering algorithms to water as efficiently as possible. With optional Spruce Soil Moisture Sensors, you'll also know exactly when and how much to water. Water your yard, check in on your sensors and schedules, view charts, and more with the Spruce Irrigation mobile app. A Spruce Irrigation Controller is required.