Watering the garden, this almost meditative gesture in the evening, hose in hand, which we rarely associate with a real issue of water management. And yet the numbers tell a different story.
According to ADEME, the Ecological Transition Agency, watering the garden represents on average 6% of the total water consumption of a French household. A figure which may seem modest on an annual scale, but which rises sharply during the summer months, a period when watering is almost entirely concentrated. And above all, a good part of this water never really reaches its objective: in high heat, up to 60% of the watering water evaporates before even having been absorbed by the roots of the plants. In other words, more than half of the effort made can literally go up in smoke, literally.
This evaporation figure radically changes the way we approach the task. Watering is not just a question of the amount of water poured, it is mainly a question of timing and method. Watering in full sun, at the hottest time of the day, means wasting a significant portion of the water used before it can even be used for anything. A gesture that seems trivial, almost instinctive, but which can make all the difference between truly effective watering and watering which mainly fills the atmosphere with unnecessary humidity.

What this task actually involves

Watering the garden consists of providing the water necessary for the plants, lawn, flowerbeds or vegetable garden, adapting the quantity and frequency according to the type of vegetation and the current weather conditions. Allow around 10 minutes for a standard session, a time which can vary greatly depending on the size of the garden and the watering method used (watering can, hose, automatic system).

Tips and tricks for truly effective watering

The time of day matters a lot: watering early in the morning or late in the evening, when temperatures are lower and the sun is less intense, considerably reduces evaporation losses compared to watering in the middle of the day. This simple schedule adjustment can be enough to drastically limit waste without changing anything else in your routine.
Mulching remains one of the most effective and underestimated actions: a layer of organic matter (straw, bark, dried clippings) placed at the base of the plants limits direct evaporation from the soil and retains humidity much longer, reducing the frequency of necessary watering. Regular hoeing of the soil surface, by breaking the superficial crust which forms after watering, also promotes better penetration of water towards the roots.
For more advanced installations, a drip watering system delivers water directly to the base of each plant rather than spraying the entire surface, which significantly reduces losses through evaporation and runoff. Coupled with a rainwater collector, this device makes it possible to cover a large part of the garden's needs without drawing on drinking water, particularly valuable during periods of restriction which have become more and more frequent in recent years.

With up to 60% loss by evaporation depending on conditions, watering the garden is not just a question of generosity towards your plants: it is above all a question of timing. A simple change of schedule, from the middle of the day to the morning or evening, can transform half-wasted watering into a truly effective action.