The invention relates to a plate-shaped structure for cultivating one or more plants. The plate-shaped structure may optionally collect moisture from the atmosphere and comprises a generally flat upper surface provided with a cavity for holding plant material. The cavity has a sidewall and a bottom portion. Further, the bottom portion includes an aperture traversing the plate-shaped structure. In use, the plate shaped structure can cover a reservoir or can be placed on the soil. Optionally, the plate-shaped structure comprises a drain opening with a floating cap and a covering cap so as to allow moisture to flow through the drain opening while minimizing evaporation. Further, the plate-shaped structure may have a cap structure at its periphery for clampingly receiving the upwardly extending exterior sidewall of the reservoir. The plate-shaped structure can be fixed to the reservoir using a protrusions traversing corresponding openings.
