Abstract: An apparatus or greenhouse is shown, which comprises both a treatment area and growing areas. Normally the plants are kept in the growing areas. When the plants have to be treated they are conveyed to the treatment area, in which area treatment equipment (like sprinklers, elements for applying pesticides) is fitted. Also transport means for supplying and removing plants extend only into the treatment area.According to a preferred embodiment the treatment area is longitudinal and the growing area's are located on both sides of said treatment area. The conveying means are tables moveable along paths extending perpendicular to the length of the treatment area. Two tables are moveable along each paths, an upper table resting on an outer pair of rails and a lower table resting on an inner pair of rails. The containers with the plants therein are placed on the tables.