Abstract: An apparatus is disclosed for watering plants received in a non-hydroponic substrate, comprising an upwardly open planter for receiving at least one plant with non-hydroponic substrate, the planter having a planting cavity enclosed by a wall and a bottom configured for receiving a plant with the substrate, further comprising a liquid container which is at least partially integrated in the planting cavity or is designed as a separate liquid container which is inserted into the planting cavity from above or is held on an outer wall of the planting cavity, the liquid container being a container which is sealed off from the outside and which has an outlet pipe which opens into a region separated from the planting cavity at a certain distance from the bottom of the planting vessel, the separated region communicating with the planting cavity via at least one connecting opening and communicating with an outer side of the planting vessel via at least one ventilation opening, in such a manner that a liquid volume is e