Smart irrigation controllers: weather and soil are different signals

Two ways to inform watering

EPA WaterSense distinguishes weather-based controllers, which use weather and landscape information, from soil moisture-based controls, which can prevent watering when the soil is already moist. Some products combine inputs.

Check compatibility before buying

List your existing controller, number of zones, sensor connections and the support you need. Ask whether an upgrade replaces the controller or adds a compatible device. The WaterSense label applies to certified products; it does not certify every component sold under a brand.

Commission the settings

Automation still depends on correct landscape information, installation and maintenance. Keep a copy of initial settings, then inspect the first watering cycles. Confirm that the system’s response makes sense for each area and that local watering restrictions are respected.

Use a commissioning checklist

Before installation, agree who will enter the landscape information, demonstrate manual operation and explain how to pause watering. Ask which functions require an internet connection or a continuing subscription, and confirm current terms with the supplier. Keep access recovery information privately with the property owner rather than in a public maintenance record.

After setup, choose one zone and compare the displayed decision with what actually happens outside. If the system reports a skipped event, record the reason shown and check the site. The point is to learn how this particular installation behaves, not to assume that the word “smart” guarantees the right result.

Arrange support before a fault

Ask who will troubleshoot communication problems, sensor faults and physical valve issues. A controller installer and a landscape maintenance company may have different responsibilities. Request a clear handover when someone changes the program. Have a qualified professional assess electrical or compatibility work instead of experimenting with unidentified wiring.