Urban water conservation is very important in California given the limited amount of available freshwater. Landscape irrigation is the largest user of urban water in Southern California. Therefore, it is important to schedule irrigation properly to avoid water loss while keeping plants healthy. Smart irrigation controllers can help save water by adjusting irrigation based on weather conditions and soil moisture levels. This publication focuses on soil moisture sensor-based irrigation controllers that can be used for landscape irrigation management in different urban settings, including residential areas. These controllers monitor soil moisture levels and use this information to avoid unnecessary irrigation, helping reduce water waste. This publication provides essential information to help readers understand the science behind these controllers and how to use and maintain them in practice. Available rebate programs for purchasing smart irrigation controllers and soil moisture...