Heavy rain changes what a garden needs from its drip system. A schedule that worked during dry weather can leave soil waterlogged once frequent showers begin, while sediment and vigorous plant growth can make small faults harder to spot. Before the wet season, inspect the system, make adjustments gradually, and check how water moves through your garden. These steps help reduce unnecessary watering and make it easier to identify leaks, blocked emitters, or drainage problems when conditions shift.
Inspect the Whole System
Run the system briefly and walk each line while it operates. Look for leaks at connectors, cracked tubing, loose stakes, and emitters that spray or drip unevenly. Check low spots where water may collect and areas where garden work or growing roots could have shifted a line. Repair visible faults before heavy rain makes them harder to locate.
Clean the filter according to the manufacturer’s instructions and check the pressure regulator and backflow components for damage. A clogged filter can reduce flow across a zone, while a damaged fitting may waste water even when the soil is already wet. If you cannot identify the cause of uneven flow, note which lines and plants are affected before asking a qualified irrigation specialist to inspect them.
Adjust Watering for Rain
Reduce scheduled watering as rainfall becomes more frequent, and use the controller’s rain-delay or seasonal adjustment feature if available. Avoid relying on a fixed calendar alone: rainfall can vary across a property, and covered beds may stay drier than open areas. Check the soil near the root zone before starting a cycle. If it is still moist, postpone watering and reassess later.
Set watering for early morning when you do need to run a cycle. This gives plants time to take up moisture and makes it easier to spot leaks in daylight. If your controller has a rain sensor, test its operation and confirm it can pause irrigation after rain. Keep an eye on newly planted areas and pots, which may dry out differently from established garden beds.
Check Drainage and Plant Needs
Drip irrigation delivers water to specific areas, but it cannot correct poor drainage. After a substantial shower, look for standing water, washed-out mulch, or soil that remains saturated around plant roots. Clear blocked drains and surface channels where safe, and redirect runoff away from beds if it is eroding soil. Do not add extra irrigation to a bed that is already waterlogged.
Review each zone as plants grow or change. A mature shrub may need a different emitter arrangement than a new planting, and roots can shift or cover tubing over time. Keep emitters near the active root area without placing them against stems. Use mulch to limit soil splash and evaporation, but leave emitters accessible for inspection and avoid burying lines where you cannot check them.
Secure Lines and Recheck
Secure tubing with suitable stakes, especially along slopes, exposed edges, and places where runoff could move soil. Remove debris from around accessible valves and keep control boxes protected from standing water. If a line has become exposed, reposition it carefully and check that fittings remain firmly connected. Avoid walking or driving over tubing, which can pinch it or loosen joints.
After the first heavy rain, inspect the garden again and compare the soil moisture across different zones. Look for pooled water, shifted lines, and emitters blocked by sediment. Make one schedule change at a time so you can see how the garden responds. Keep a simple note of rain, irrigation runs, and recurring problems; it can guide later adjustments without guesswork.
A wet-season check does not need to be complicated: inspect the lines, clean the filter, adjust the timer, and watch how each bed drains after rain. Revisit the system when conditions change rather than leaving one schedule in place. If you would like help checking your setup, Cairns Drip Gardens can discuss practical next steps.