Choosing an Automatic Irrigation Controller: Features, Accessories, and Top Models

Automatic timers manage sprinkler and drip systems. Modern controllers offer sophisticated features for precise hydrozoning (grouping plants by water needs).

Key Features

1. Multiple programs: Each runs one or more valves (stations). Two programs suit simple lawn + shrub border; most gardens need ≥3.
2. 365-day calendar clock: Set year/month/day for maximum scheduling flexibility, including odd/even-day watering mandates.
3. Water budgeting: Adjust all station run times globally in 10% increments for heat waves or cool spells.
4. Long run times (up to 10 hrs): Deep-soak trees.
5. Self-diagnostic circuit breaker: Identifies faulty valve while keeping others running.

Accessories

• Remote control (~$150): Operate stations/programs from hundreds of feet away.
• PC programmer (~$100): Create schedules on computer, download to controller.

Sources

Home centers carry basics; irrigation supply stores offer versatile models. Also mail-order from Urban Farmer Store (415-661-2204, www.urbanfarmerstore.com).

Recommended Models (6-station base prices)

• Hunter SRC ($110): 3 programs, 9 stations; features 1, 2, 6, 7.
• Irritrol Rain Dial Series ($145): 3 programs, 12 stations; features 1, 4, 5.
• Irritrol Rain Dial Plus ($155): 3 programs, 12 stations; features 1, 2, 3, 4, 5.
• Irritrol Total Control ($200): 4 programs, 24 stations; features 1, 2, 3, 4, 5.
• Rain Bird E Class ($100): 3 programs, 12 stations; features 1, 2, 3, 4, 5.
• Rain Bird ESP Series ($145): 4 programs, 24 stations; features 1, 2, 3, 4, 5.