A crimper for managing the growth of a plant by controlling the position of a branch of the plant over the course of the plant's growth. The crimper includes a shaping tool and a growth control member. The shaping tool includes a gripping section and may also include a handle section, wherein the gripping section includes a first member and a second member, wherein the first member and the second member are curved in the same direction. The growth control member is arranged for placement about the branch of the plant, wherein actuation of the shaping tool causes the first member and the second member to squeeze the growth control member into a fixed curved shape about the branch of the plant.