There are a number of options when choosing an electronic timer. Some models run programs that turn each circuit on in a specified order, for the same amount of time, for the same number of times each week.

More sophisticated models can run different programs on different circuits, allowing you to fine-tune the frequency and duration of each circuit for the different areas of your landscape.

While the more features a timer has the more expensive it will be, here are some features that may make the extra cost worth it to you:

• The ability to run separate programs on two valves at the same time (just make sure you have adequate water flow and pressure)

• Battery backup that maintains the clock and program information in case of a power outage

• Expandable programming should you add circuits to your system in the future

• A rain sensor that monitors rainfall and turns off the system if it detects too much water, reducing waste and preventing a soggy lawn

• A remote control that allows you to reset programs without having to access a dark corner of the garage to make the changes

• A seasonal adjustment feature that allows you to adjust programs for the time of year and the likely temperatures and rainfall.

Photo copyright Sunset Publishing Corporation