A plant graft production line for automatically grafting a rootstock and a scion is disclosed. The plant graft production line comprises (a) a closed-loop conveyor； (b) at least one grafting assembly arranged for transporting along said conveyor； a stationary cutting mechanism for cutting exposed rootstock surface； (c) a stationary cutting mechanism for cutting exposed scion surface； (d) a stationary clipping mechanism for clipping superimposed rootstock and scion together. The rootstock holder is arranged as an at least three point grip. The holder comprises a supporting member having a rounded top arranged to support the rootstock and clamping elements.
