Irrigation System

We start from the planting plan, not a catalogue. Grouping plants by their true water need — hydrozoning — is what lets a system be both generous to the garden and frugal with water.

Drip and micro-emitters then place that water precisely at the root, and zoned controllers schedule it for the cool of the morning, adjusting through the seasons. Where the site allows, we capture rainwater to lean on the mains less.

The whole system is laid out to be maintained: accessible valves, labelled zones, and sensors that stop it watering ground that is already wet.

An irrigation design that has not been built around the actual water source is a drawing, not a system. In and around Udaipur we are usually working with one of three, and often with a combination.

Municipal supply arrives on a schedule rather than continuously, which means the system has to be built around storage. The pump draws from a tank, not from the mains, and the tank has to be sized for the longest gap the property actually sees — not the published one.

Borewell gives control but rarely gives soft water. Bore water in this region is commonly hard and often carries fine sand, and both matter enormously to a drip system. It also has a yield limit that must be respected: a pump run beyond what the bore can deliver will draw air, and cavitation will finish the pump long before the warranty does.

Tanker is the summer reality on many estates, and it changes the design intent. A property that will be buying water in May should be irrigating for plant survival then, not for appearance, and the controller should have a season programme that says so.

We size storage, pump and zones against the worst month the property has actually had, not the average. Averages are how systems come to fail in exactly the week they are most needed.

Nearly every failed drip installation we are asked to look at failed for the same reason: nothing was filtering, or what was filtering was never cleaned.

A drip emitter meters water through an opening measured in fractions of a millimetre. Fine sand from a bore will block it mechanically. Hard water will scale it closed chemically, from the inside, over a season or two — and the failure is gradual and invisible, so nobody notices until a run of plants is dying and the pipe still appears to be working.

So every system we install has filtration matched to the source: screen or disc filtration as standard, sand separation where the bore carries grit, and flush valves at the end of every lateral so the lines can actually be cleared rather than theoretically cleared. Where water hardness warrants it, we design for acid or chelate injection through the system and write the regime into the maintenance schedule.

And we build in the boring part: flushing intervals, filter cleaning intervals, and a pressure gauge either side of the filter so that a blocked one announces itself instead of being discovered.

One method across a whole property is almost always the wrong answer, because different layers of planting want water delivered in genuinely different ways.

Inline drip for shrub beds, groundcover and hedging. It puts water at the root, loses almost nothing to evaporation, and keeps foliage dry, which matters for fungal disease through the monsoon. Under mulch it is close to invisible and close to unbeatable on efficiency.

Bubblers or ring drip for trees and large specimens, which want a deep, slow, infrequent soak that drives roots downward. Watering a tree on the same schedule as a shrub bed is how you get a ten-year-old tree with a two-year-old root system that falls over in the first real storm.

Rotor or spray for lawn, where uniform coverage over an area is the point. Here head spacing is the whole game — heads must be spaced for head-to-head coverage, so every point on the lawn is reached by at least two heads. Anything less produces the pattern of dry crescents that gets blamed on the grass.

Micro-sprinkler for dense mixed planting and kitchen gardens, where drip would leave gaps between closely spaced crops.

The single biggest inefficiency we find is a property irrigating a drought-tolerant shrub bed on the same valve, at the same frequency, as a lawn — because both were put on one zone when the system was installed.

Zones should be divided by water demand, by delivery method, and by exposure. A south-facing bed in full sun and a shaded courtyard have entirely different needs and should never share a valve. Nor should a new planting still in establishment and a mature bed that has not needed supplementary water in years.

Each zone then gets its own schedule. In practice that means the lawn runs on one regime, established shrub beds on a far leaner one, trees on an infrequent deep soak, and anything in establishment on a temporary programme that is deliberately wound down as it takes.

A controller with independent programmes per zone, a rain sensor so the system does not run during the monsoon, and — on larger properties — soil moisture sensing, turns this from an intention into something that actually happens when nobody is watching.

Summer, March to June. Peak demand. Watering moves to the early morning — before about seven — because midday application is largely lost to evaporation and evening application on foliage invites disease. Depth matters more than frequency.

Monsoon, July to September. The system should mostly be off, and this is where properties waste the most water, because a controller left on its summer programme will happily irrigate through a week of rain. A rain sensor or a soil moisture threshold pays for itself in one season. Drainage matters more than delivery now.

Winter, October to February. Demand falls sharply. Frequency drops, run times shorten, and the regime shifts towards keeping established planting ticking over rather than pushing growth. This is also the window for system maintenance — flushing, filter service, checking every emitter and head before the next summer asks anything of them.