Water Window is defined as ...

• A. A period when irrigation is allowed for any zone
• B. An allotted time available for watering through an irrigation system, usually within a 24 hour period
• C. The total annual water budget for the landscape
• D. A limit on the number of irrigation events per day

Answer: (B)

Water window is the time frame during which irrigation is permitted each day. It sets the duration you can run the irrigation system within a 24-hour period, aligning watering with restrictions and the landscape’s needs. This concept focuses on how long you are allowed to water in a daily cycle, not on watering per zone, annual water budgets, or how many watering events you can have per day. In practice, the window helps you plan and apply the right amount of water within the permitted hours.