How to Support Wisteria Vines: Building Strong Structures for Heavy Climbers

Wisteria is heavy. Its main stems eventually reach several inches thick—and in great age, may equal a small tree trunk. Plan for this ultimate weight when planting, or the vine will overwhelm its support.

Establishing Vines Against a Wall

Most gardeners grow wisteria on a wall, sturdy arbor, or pergola. To establish against a house wall: screw a series of 6- to 8-inch L-brackets to the support. One vertical row runs up the wall center at 1-foot intervals; horizontal rows run 2-3 feet apart. Attach the top row 3 feet below eaves to prevent vines growing into them. Run galvanized wire between brackets, then tie the young vine to the wire with string; stems will twine as they grow. The wire sits 6-8 inches from the wall, allowing air circulation and growth space.

Growing Vines Up an Arbor

Ensure support posts are at least 4x4 inches. The main stem can twine around a post or grow straight against it; secure with heavy-duty garden twine until it tops the structure and attaches there.

During establishment (first 1-2 years), leave lateral branches on the main stem. Once growing well, gradually pinch or prune lateral growth at the base. Continue removing some laterals each year as the vine ascends, then heads along the arbor roof.

Once the vine reaches the roof, direct growth horizontally, tying in place. Mature weight and twining side branches will hold it. If extra security is desired, check ties annually to prevent girdling.