An adjustable plant support assembly is provided which can be quickly and easily assembled with no tools at all. When disassembled it can be stored in a minimum space, and since there are very few different components it can be manufactured in a simple manner. A plurality of vertical support posts are disposed at the corners of a polygon, e.g. four support posts are disposed at the corners of a rectangle. A plurality of support rods horizontally interconnect the support posts with apertures at the corner angles of the intersecting rods to provide horizontal support. The interconnecting rods can be moved up and down vertically along the vertical support posts to provide the appropriate height to support the plant. The horizontally interconnecting rods can be secured in place by a screw or other fastening device.
