An orchard fertilizer spreader has rearwardly positioned conveyors that are independently laterally extendable between a minimum width transport position and a maximum width operating position to deliver fertilizer from a supply tank to the orchard trees. The conveyors are mounted in a longitudinally spaced configuration to permit a diverter box to supply fertilizer to either conveyor or to both conveyors simultaneously through manipulation of diverter panels. The conveyors are mounted on a support pan formed with a plurality of rollers to facilitate the lateral extension of the conveyors. The support pan is pivotally mounted on a frame to forma a breakaway that enables the conveyors to rotate in the event of impact between a conveyor and an object. The reset of the conveyors into the laterally extended position is accomplished with a hydraulic cylinder. The conveyors can be laterally extended manually, or via a hydraulic cylinder.