A system of wires and poles used to support growing grape vines. There are many trellising techniques employed around the world, two of the most common being the head-trained and cordon-trained systems. Head trained refers to the top of the vertical trunk terminating in several arms. Often in this system the canes are brought up from the low head, then arched and tied down, resembling an umbrella. Cordon trained vines do not have a head region but rather are bent horizontally along a trellis wire. In the double-cordon system, short cane or spur pruning is employed to provide for a more uniform fruit zone.
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