Abstract: In a vineyard or the like, a system for positioning and tensioning the wires which form the trellis disposed between and among an array of metal posts upon which vines are trained, including retainers for selectively positioning wires relative to the metal posts and each other and further including a subsystem for applying the appropriate tension to the various wires making up the trellis.

Abstract: In a vineyard or the like, a system for positioning and tensioning the wires which form the trellis disposed between and among an array of metal posts upon which vines are trained, including retainers for selectively positioning wires relative to the metal posts and each other and further including a subsystem for applying the appropriate tension to the various wires making up the trellis.

Abstract: In a vineyard or the like, a system for positioning and tensioning the wires which form the trellis disposed between and among an array of metal posts upon which vines are trained, including retainers for selectively positioning wires relative to the metal posts and each other and further including a subsystem for applying the appropriate tension to the various wires making up the trellis.

Abstract: The present invention relates to improvements in trellis systems for supporting growing fruit bearing vines, and in particular, to improvements in the trellis itself wherein cross member secured to a post is fitted with rotator arms at either end thereof, which rotator arms are movable about their mounting point through an acute angle of about 45.degree. to 50.degree., and capable of being secured against inadvertent rotation at a predetermined position relative to the cross arm so as to permit sun to shine on the central area of the vine when the rotator arms are moved downwardly, and to permit harvesting when the arms are upright.