Grave irrigation

The watering device has a water trough (4) covered by a cover plate (5) on which the soil (6) is placed. In the cover plate are trench indentations (9) which project into the water in the trough. The indentations are provided with openings and are filled with earth so that the water is sucked from the trough over the earth into the indentations into the earth on the cover plate. The cover plate is supported with the indentations on the bottom of the trough and the cover plate has around the perimeter an upwardly projecting edge and further openings (8) for aeration and draining water from the earth on the plate into the trough.