Systems and methods for optimizing the efficiency of a watering system through use of a radio data system

A method for communicating with a watering system controller, comprising:

• receiving optimization data over a radio data system at an interface unit that functions as an interface between the radio data system and a watering system controller that controls operation of a watering system according to watering instructions stored in the watering system controller;
• and
• using the optimization data to modify the watering instructions.

A method for communicating with an interface unit that is in communication with a watering system controller, comprising:

• obtaining weather information from a weather database;
• calculating optimization data based on the weather information;
• transmitting the optimization data over a radio data system to a first interface unit, the first interface unit functioning as an interface between the radio data system and a first watering system controller that controls operation of a first watering system, the first interface unit being configured to use the optimization data to modify first watering instructions stored in the first watering system controller.