The invention relates to a potted plant watering device and a water transporting line (WL) which is used in said watering device, said transporting line comprising a fibrous material (FB) which makes use of capillary action and comprising a watertight casing (HU) which surrounds the fibrous material in a tubular manner. The fibrous material (FB) and the casing (HU) are formed in a flat manner in the shape of a strip, and the tubular casing (HU) walls (W1, W2) which are formed in a flat manner in the shape of a strip, which lie opposite each other, and which enclose the fibrous material (FB) between each other are designed with different flexural rigidities. The different flexural rigidities are preferably achieved by forming a second casing wall (W2) with a constant wall thickness (DW) from a homogenous material and by increasing the flexural rigidity of the first casing wall (W1) by means of a central strip (MS) consisting of a second material with a greater wall thickness and/or a higher Shore hardness.
