All smart sprinkler controllers are designed to give you some kind of interface with an app on your smartphone. These apps allow you to easily control your watering system from anywhere. You can change the watering amounts or times in the middle of the day, track how much water you use, and adjust the schedule as you see fit.

Below, we explore the two basic types of smart sprinkler controllers on the market today.

Basic smart sprinkler controllers turn any irrigation system into a device you can control from a smartphone app or with your Amazon Alexa. They’re a major step up from the timer-driven models most homeowners use. You can easily adjust zone watering and also track how much water and time your system is using.

The WaterSense program is an EPA-approved program that helps consumers improve water efficiency. If you’re interested in conserving water, a WaterSense-certified smart sprinkler controller is the best route to take.

Controllers that are certified by the WaterSense program provide you with system access via a smartphone app, but the device is designed to work more like a thermostat than a pre-set timer system. It’s a completely “smart” system that can sense when your lawn needs water by checking the weather forecast and, in some cases, checking ground moisture.

A smart sprinkler controller can customize the amount of water received by various zones in your yard. The controller determines the ideal watering amount for each zone based on factors such as the following.

• Slope of the terrain

• Shade cover

• Type of plants

• Soil type

For example, a particular zone of your yard might need less water than another zone because there is more clay in the soil. Clay is known for its water-retaining properties.

Smart sprinkler controllers are made to be compatible with your devices. Many are designed with specific voice commands that work with controllers like Amazon Echo and Amazon Alexa. Even low-end ones made to hook up to a hose are designed for use with downloadable apps for your smartphone.

The app function allows you to see how much water your lawn is getting zone by zone. You can control it yourself, or can choose a system with a WaterSense design that uses WiFi to check the forecast.

• Under $100: In this price range, you’ll find low-end smart sprinkler controllers that can be hooked up to a hose sprinkling system. The sprinkler has a shutoff valve in the system to give you control over watering from your smartphone or other internet-capable device.
• $100 to $200: This price range is the starting point for in-ground watering system smart sprinkler controllers. Some show you the weather forecast and record when you last watered, but items at this level will not generally adjust watering to the rain automatically.
• $200 to $300: Higher-end models are easier to use and have a better interface with slicker graphics. They also allow you to control a higher number of zones, check the forecast, and adjust watering accordingly. They will work with water sensors to prevent overwatering in cooler weather and can alert you to freeze warnings. You can control more stations individually in your yard, too. At this higher price point, you may also get an interior wall mount control in addition to the control on your phone app.

• Place the outside sensor portion of your smart sprinkler system in an area that reflects the general sun exposure of your entire lawn.

• Keep your smart sprinkler within range of your WiFi router. Otherwise, it will not work properly.

• Are you interested in water conservation? A smart sprinkler controller with “WaterSense” EPA certification is your best best. WaterSense models actually control the watering based on the weather.

Q. What exactly does a smart sprinkler controller do?
A. Smart sprinkler controllers have a WiFi-enabled sensor unit you install in your yard. The unit controls your irrigation system, giving you the ability to make watering adjustments from your smartphone based on the weather. Some smart sprinkler controllers make the adjustments themselves; others require a manual override.

Q. Can I use a smart sprinkler controller on my manual lawn sprinkler?
A. In some cases, yes. You do not necessarily have to have an in-ground irrigation system to benefit from a smart sprinkler controller. Some smart sprinkler controllers are made to hook up to your water line and control the water flow. These will allow you to use the smart technology with any sprinkling system.

Q. Can I install a smart sprinkler controller myself?
A. High-end models often require hardwiring to your existing pump house system; you may want to hire a professional to complete this task. Low-end models, particularly those designed to work with hoses, are easy to install; simply plug and go. Most homeowners feel comfortable installing this type of smart sprinkler controller themselves.

Q. How many stations can a smart sprinkler controller support?
A. This number varies by system. Eight stations can be supported by many systems. Higher end models can be expanded to support up to 20 or more zones.