An apparatus, configured to be fitted to a collection unit, for separating berries from other plant matter from harvested plant material, the apparatus comprising: - a first separating conveyor system comprising an array of rollers, rotatable to convey harvested plant material in an upstream to downstream direction, the rollers spaced apart to form a plurality of openings therebetween permitting the transit of separated berries therethrough while preventing the transit of other plant matter; and - a second separating conveyor system comprising, a continuous mesh belt or grate belt mounted to rotate around an upstream shaft and a downstream shaft, for conveying harvested plant material in an upstream to downstream direction, the continuous belt of the second conveyor system including a plurality of openings configured to permit the transit of berries therethrough while retaining other plant matter on the continuous belt, wherein the first and second separating conveyor systems (3, 4) are arranged such that berries and other plant matter from the first conveyor system are deposited onto the second conveyor system, and a de-stemming unit is adapted to receive berries transported from the second separating conveyor system, characterised in that the second separating conveyor system is located in vertical axial alignment with the first separating conveyor system and positioned below the first separating conveyor system. - a first separating conveyor system comprising an array of rollers, rotatable to convey harvested plant material in an upstream to downstream direction, the rollers spaced apart to form a plurality of openings therebetween permitting the transit of separated berries therethrough while preventing the transit of other plant matter; and - a second separating conveyor system comprising, a continuous mesh belt or grate belt mounted to rotate around an upstream shaft and a downstream shaft, for conveying harvested plant material in an upstream to downstream direction, the continuous belt of the second conveyor system including a plurality of openings configured to permit the transit of berries therethrough while retaining other plant matter on the continuous belt, wherein the first and second separating conveyor systems (3, 4) are arranged such that berries and other plant matter from the first conveyor system are deposited onto the second conveyor system, and a de-stemming unit is adapted to receive berries transported from the second separating conveyor system, characterised in that comprising, a continuous mesh belt or grate belt mounted to rotate around an upstream shaft and a downstream shaft, for conveying harvested plant material in an upstream to downstream direction, the continuous belt of the second conveyor system including a plurality of openings configured to permit the transit of berries therethrough while retaining other plant matter on the continuous belt, wherein the first and second separating conveyor systems (3, 4) are arranged such that berries and other plant matter from the first conveyor system are deposited onto the second conveyor system, and a de-stemming unit is adapted to receive berries transported from the second separating conveyor system, characterised in that