Abstract: An air pruning plant growth system comprising an air-pruning tray having a plurality of plant growth cells with upper elliptical openings within an upper plane, lower elliptical openings with diameters larger than the diameters of the upper elliptical openings within a lower plane spaced from and parallel to the upper plane, continuous, upwardly tapering, side walls joining the upper and lower opening, and a continuous, horizontal bottom wall joining the cells; and a support tray having an air permeable floor and upwardly extending tray side walls.