The invention relates to a potted plant watering device with a water transporting line (WL) comprising a fibrous material (FB) that uses capillary action. An end region (E1) of the fiber strand of the water transporting line is fixed in the vicinity of the base (BO) of a water storage container (VB) of the water storage device by means of a retaining device (ST) in the water storage device so as to ensure that a fiber strand portion that receives water remains in contact with water that can be found in the water storage container even in the event of low fill levels in the water storage container (VB). The retaining device (ST) is preferably designed integrally with a lid arrangement (DE), with which the water storage container (VB) is covered, and simultaneously forms a surface (ST) for placing a plant pot (TO).