Abstract: The transporter has a frame which is fastened to a side rail of a foremost one of a plurality of juxtapositioned plant trays. It has an electric motor mounted thereon, and a gear reducer coupled to the output or power end of the motor. The trays are supported on a pair of extended beams by rollers, underlying the trays, and fixed to the trays. The gear reducer drives a sprocket, and three rubber-tired wheels are rotatably supported by the frame and engage one of the beams; two of the wheels engage one side of the beam, and the other is equi-distant from the axes of the two and engaged with the beam on the opposite side. Each wheel has an axle journalled in the frame and having a sprocket fixed to an end thereof. A continuous chain is engaged with the driven sprocket, and with the other three; upon the motor being turned on, this causes the wheels to turn and travel along the engaged beam and, in this way, the whole plurality of trays are pushed along the two beams.