A hemp harvester for picking flowers or buds of a hemp plant to be harvested having a stem with leaves, and flowers or buds, characterized in that a retractable arm is provided for picking up and holding a hemp plant that has been cut at ground level and is hanging upside-down at its stem, wherein the retractable arm guides the hemp plant by means of a rail guide to and through at least one or more belt pickers that are arranged sequentially in the processing path, the at least one belt picker comprises at least two opposing drum belts forming a picking space therebetween for the plants to be harvested, the surfaces of the drum belts are driven continuously downwards within the picking space, the plants are guided vertically, with the plant tips hanging downwards, through the picking space in a feed direction past the drum belts, and that a folding belt is provided downstream of the belt picker in the path of harvested crop picked by said picker in the from of buds, flowers, leaves, and other plant parts for transporting and filtering the comminuted harvested crop, in particular fed by means of a folding belt for transporting and filtering the comminuted harvested crop, the folding belt running on rollers guided on a frame is provided with folding rakes hingedly connected thereto, the folding rakes are designed with their tips foldable away from the surface of the folding belt about a pivot axis perpendicular to the direction of motion of the folding belt, parts of the harvested crop may be selectively filtered during transport on the folding belt by means of the gaps between the projections of the folding rakes in accordance with their size by falling through the gaps between the folding rakes. a retractable arm is provided for picking up and holding a hemp plant that has been cut at ground level and is hanging upside-down at its stem, wherein the retractable arm guides the hemp plant by means of a rail guide to and through at least one or more belt pickers that are arranged sequentially in the processing path, the at least one belt picker comprises at least two opposing drum belts forming a picking space therebetween for the plants to be harvested, the surfaces of the drum belts are driven continuously downwards within the picking space, the plants are guided vertically, with the plant tips hanging downwards, through the picking space in a feed direction past the drum belts, and that a folding belt is provided downstream of the belt picker in the path of harvested crop picked by said picker in the from of buds, flowers, leaves, and other plant parts for transporting and filtering the comminuted harvested crop, in particular fed by means of a folding belt for transporting and filtering the comminuted harvested crop, the folding belt running on rollers guided on a frame is provided with folding rakes hingedly connected thereto, the folding rakes are designed with their tips foldable away from the surface of the folding belt about a pivot axis perpendicular to the direction of motion of the folding belt, parts of the harvested crop may be selectively filtered during transport on the folding belt by means of the gaps between the projections of the folding rakes in accordance with their size by falling through the gaps between the folding rakes.