As has been described above, the method for producing polyploid plants of orchids in accordance with a preferred embodiment of the present invention utilizes physical cutting and plant tissue culture techniques to activate endopolyploid cells,contained in a tissue culture material, to develop and become polyploid plants, without the need of using chemical agents (e.g. colchicine or other antimicrotubule agents). The method of the preferred embodiment of the present invention includes thesteps of: