The plant troughs can be placed one on top of the other by means of the morticed corners (Fig. 1.3) in a longitudinal and angular arrangement (Figs. 1 and 2), and each plant trough has on its underside (Figs. 3.4 and 6.1) a groove for receiving a plant trough mounting. A drainage channel (Fig. 3.2) can be fitted on the plant trough mounting and is fastened by means of a screw fitting with flow aperture (Fig. 4.1), consisting of a seal (Fig. 4.3) and nut (Fig. 4.5). The drainage channel (Fig. 3.2) has a terminal connecting part at the ends (Fig. 5), which is used as a closure part, connecting part and drainage part. <IMAGE>
