A plant harvesting system for use with a vertical hydroponic tower, the hydroponic tower containing a plurality of vertically aligned plants. The harvesting system includes a payload transport system and a harvester. The payload transport system, which is configured to be positioned at a location adjacent to the hydroponic tower, includes a base and a lift tower, the lift tower including a motorized lift system configured to move the harvester upward and downward. In addition to cutting plant stalks while moving upwards along the face of the hydroponic tower, the harvester also groups and collects the plant leafs.