Abstract: A seedling growth-enhancing device is disclosed, consisting of a circular tube formed from flexible, non-opaque thermoplastic material having a slit formed over its length. The tube is of sufficient size as to substantially enclose the seedling, and the plastic material is inherently resilient so that the device is normally biased into its tubular configuration. The opposed edges of the slit are fastened at the top and bottom to permit the edges to be resiliently spread at an intermediate point to permit access to the seedling for maintenance. Also disclosed are an H-clip for releasably fastening the opposed edges and a wire hanger for suspending the circular tube from an overhead suspension wire.

Abstract: A seedling growth enhancing device is disclosed which takes the form of an elongated tubular shell formed from three shell segments each having a radius of curvatures less than the effective radius of curvature of the tubular shell. The device is thermoformed from thermoplastic and includes a flexible hinge joining two common edges of the three shell segments. The third common edges are formed with male and female snapping members enabling the device to be formed around a seedling and snapped into place.