Cut long canes from your grapevines in winter, after the vines lose their leaves. Choose sturdy but pliable canes at least one half inch in diameter. Cut four to six canes that are up to 12 feet long and 12 canes that measure 2 feet.
Dig four to six closely spaced holes about 1 foot deep on both sides of the spot where you want your arbor to stand, leaving about 6 inches between holes. Alternately, dig one narrow trench on either side of the arbor’s intended location. Make your holes or trenches about 4 feet apart.
Pour quick-setting concrete and the recommended amount of water into each hole and allow it to partially harden. Then force the ends of your 12 foot grape canes into opposite holes on either side of the arbor’s location, forming an arched or looped structure. If necessary, hold each cane in place to ensure it remains upright until the concrete sets.
Cut 12 or more grape canes, making them 2 foot or slightly longer -- they must be long enough to reach across all of the upright canes with about 2 inches of excess length.
Place the shorter canes across the upright canes one at a time, wrapping floral wire around the shorter canes and long canes to attach them securely together. Use as many short canes as you prefer to give your arbor the appearance you want.