Don't have one.
They are a shocking waste of water, take too much time & effort and in the end will never look really nice. And that's assuming that the local commune lets you use a hosepipe in summer.
One expat in the area has a timer-control on his sprinkler system that waters his lawn automatically during the night. It came as a terrible shock to people renting his house when they were having a romatic evening outdoors watching the stars...