Method for the floating cultivation of a plant, in which, in a first stage of growth, the roots of the plant are kept at a distance from a water supply situated underneath the plant. The supply of moisture to the plant can be effected via the intermediate space between the float for the plant and the water supply and from the top side of the plant. As the plant develops further, the root system grows in the direction of the water supply and, in a second stage of growth, the vast majority of the water requirement is satisfied directly by the water supply. This is achieved by way of a panel which floats on the water supply and is provided with holes for accommodating the plant. This panel may be provided with recesses which are closed at their top sides and reduce the area of contact with the water and provide closed chambers.