Short Answer
An automatic garden irrigation system divides the garden into zones, each served by a solenoid valve that opens and closes on a programmed schedule set by a controller. The controller sends a signal to the valve, water flows to the sprinklers or drip emitters, and after the run time the valve closes and the next zone opens. A smart controller adds weather-based adjustment so the system skips watering before rain and scales run times by season.
How the zones work
An automatic garden irrigation system divides the garden into zones, each served by a solenoid valve that opens and closes on a programmed schedule set by a controller. The controller sends a signal to the valve at the programmed time, the valve opens, and water flows through the pipework to the sprinklers or drip emitters in that zone. After the programmed run time, the valve closes and the next zone opens.
Smart controllers
A smart controller such as Hunter Hydrawise adds weather-based adjustment, so the system skips watering before rain and scales run times by temperature and season.
Sensors and flow monitoring
Rain and soil-moisture sensors can override watering, and a flow sensor can detect leaks and shut off the master valve automatically. The whole system runs unattended once programmed.
Key Takeaway
Automatic irrigation works by dividing the garden into zones, each controlled by a solenoid valve on a programmed schedule, with a smart controller adding weather-based adjustment so watering happens only when needed.
Frequently Asked Questions
Do I need to turn the irrigation on and off manually?
No. The controller opens and closes each zone on a programmed schedule. A smart controller adjusts for weather automatically, so the system runs unattended.
What happens if it rains?
A rain sensor overrides watering during and after rainfall, and a smart controller checks the weather forecast and skips watering before rain is due.
Can I control different zones on different days?
Yes. Each zone has its own schedule, so lawns can water on different days and times to borders, containers and hedges.
How long does each zone run for?
Typically 10–30 minutes for lawns and 5–15 minutes for drip zones, adjusted by season. A smart controller adjusts these times automatically based on weather and soil type.