Abstract: The invention relates to cultivation of a rose plant in a greenhouse and the like which is capable of growing a rose so that an object twig with a flower can be cut in about a waist-high position, and picking cut flowers with long stems and of a high quality. In the invention, initially grown twigs are bent in the vicinity of the plant foot and kept prostrated, and basal shoots coming out from the position near said foot are grown into twigs. Then, the twigs with flowers are cut off at the base portion thereof to obtain the initial cut flowers.