Abstract: Irrigation control systems are described. In a number of embodiments, the irrigation control systems include a wireless irrigation controller that activates valves within an irrigation system and can wirelessly communicate with an access point. In several embodiments, the irrigation control system includes an ASP server that obtains weather information and can query irrigation controllers for information. In many embodiments, the ASP server aggregates information regionally and can provide water authorities with information concerning water usage and water savings. In further embodiments, the ASP server can provide access to authorized third parties, such as landscape contractors, enabling the third parties to remotely adjust the baseline watering schedule. In several embodiments, the ASP server uses information collected from an irrigation control system to provide one or more users associated with the irrigation control system with relevant information and/or marketing materials.