A plant support device (1) having a horizontal support (3) with vertical stakes (10) extending downward therefrom. The stakes may be height adjustable to accommodate various heights of different plants (2) and to allow a user to increase the height of the plant support device as a plant grows. The horizontal support is preferably made of a flexible material that allows a user to curve it around an entire plant to create a ring (13) that encircles the entire plant or to create a partial ring (21) that supports only one side of the plant. The diameter of the ring may be adjusted to accommodate various widths of different plants and to allow a user to increase the diameter of the ring as a plant grows. Multiple plant support devices may also be attached to one another to enlarge the diameter of the ring.
