How to Attach Grape Vine to Trellis

Attaching a grape vine to a trellis is a crucial step in maintaining a healthy and productive grapevine. A well-supported vine not only produces better fruit but also makes harvesting easier and more efficient. Here's a comprehensive guide on how to attach grape vine to trellis, ensuring your vine grows strong and yields delicious grapes.

Before we dive into the process, it's important to understand the type of trellis you're using. Grapevines are typically grown on either an arbor, a post-and-wire system, or a split-post system. This guide will focus on the post-and-wire system, which is one of the most common and effective for grapevine cultivation.

Preparing the Trellis

The first step in attaching a grape vine to a trellis is ensuring your trellis is sturdy and well-constructed. The posts should be securely embedded in the ground, with the wires taut and evenly spaced. The ideal spacing between wires is 12 to 18 inches, depending on the grapevine variety.

If you're building a new trellis, consider using pressure-treated lumber for the posts and galvanized wire for the support wires. This will help prevent rot and rust, ensuring your trellis lasts for many seasons.

Positioning the Posts

Posts should be placed about 8 to 10 feet apart, depending on the vigor of the grapevine variety. For example, a vigorous variety like 'Concord' may need posts spaced 10 feet apart, while a less vigorous variety like 'Niagara' can be spaced 8 feet apart.

Posts should be set in the ground at least 2 feet deep to provide stability. You can use a post hole digger or an auger to create the holes. Fill the hole with water, then add concrete mix to secure the post in place.

Installing the Support Wires

Support wires should be installed at a 30-degree angle from the ground, with the top wire about 5 feet off the ground. This angle allows the vine to grow up the trellis easily and provides adequate support for the fruit-laden canes.

Use a come-along or a similar tool to pull the wire taut between posts. Secure the wire to the post using a wire tie or a staple gun. Ensure the wire is secure but not so tight that it cuts into the post.

Training the Grape Vine

Once your trellis is installed, it's time to start training your grape vine. Training involves carefully positioning the vine's canes on the trellis wires, encouraging it to grow in the desired direction.

Grape vines are typically trained using the 'Guyot' or 'Cordon' system. In this system, the vine is trained to grow along two horizontal wires, with fruiting canes growing from these main canes.

Selecting the Main Canes

In the winter, when the vine is dormant, select two strong, healthy canes to serve as the main canes, or 'cordons'. These canes should be about the thickness of a pencil and should be spaced evenly apart on the trellis. Prune the rest of the vine back to about 2 feet from the ground.

Tie the main canes to the trellis wires using horticultural tape or soft plant ties. Ensure the ties are secure but not too tight, as this could damage the cane as it grows.

Training the Fruiting Canes

In the spring, as the vine begins to grow, select two to four strong, healthy shoots from each main cane. These will serve as the fruiting canes. Train these canes to grow along the trellis wires, using the same method as the main canes.

As the season progresses, you'll need to continue training the vine, tying in new growth and pruning away any unwanted shoots. This will help ensure the vine grows in the desired direction and produces a good crop of grapes.

Summer Pruning

Summer pruning is an important part of grapevine management. It involves removing unwanted growth and encouraging the vine to produce fruit.

In late summer, after the grapevine has flowered and fruited, prune away any unwanted growth. This includes any canes that are growing in the wrong direction or are not producing fruit. Also, remove any side shoots that are growing from the fruiting canes, as these can compete with the fruit for nutrients.

With proper care and attention, your grape vine will grow strong and healthy on its trellis, producing a bountiful harvest of delicious grapes. Happy growing!