Mastering the Art: How to Tie Grape Vines to Trellis

Tying grape vines to a trellis is a crucial step in vineyard management, promoting better fruit production and easier harvesting. This process, known as training, involves guiding the vine's growth along the trellis for optimal sunlight exposure and air circulation. Here, we'll guide you through the process, from selecting the right trellis to tying the vines securely.

Before we dive into the tying process, it's essential to understand the two primary trellis systems used in viticulture: the vertical shoot positioning (VSP) system and the lyre trellis system. The VSP system is the most common, featuring a single wire at about 40-45 inches above the ground, while the lyre system has two wires, one at 30 inches and another at 60 inches, creating a 'lyre' shape.

Preparing the Trellis and Vines

Before tying the vines, ensure your trellis is sturdy and well-anchored to the ground. For new trellises, use wooden or metal posts spaced about 10-12 feet apart, depending on your vineyard's row width. Install the wires or strings at the appropriate height based on your chosen trellis system.

Next, prune your grape vines in late winter or early spring, removing any dead or diseased wood. This will encourage new growth and make it easier to manage the vine's length when tying it to the trellis.

Selecting the Right Tying Material

Choose a tying material that's flexible, durable, and won't damage the vine. Traditionally, growers use jute twine, but synthetic materials like plastic ties are also popular. Avoid using wire, as it can cut into the vine and cause damage.

Consider using biodegradable materials if you're environmentally conscious. Some growers opt for biodegradable tape or even raffia, a plant-based fiber. Whatever you choose, ensure it's strong enough to hold the vine in place but gentle enough not to cause harm.

Tying the Vines to the Trellis

Once your trellis is prepared and your vines pruned, it's time to start tying. Begin in early spring, as soon as new growth appears. Start at the base of the vine and wrap the tying material around the vine and the trellis wire, creating a figure-eight pattern. This ensures the vine is securely attached but allows for some movement, which is essential for the vine's growth.

As the vine grows, continue tying it to the trellis at regular intervals, usually every 12-18 inches. Be sure to tie it loosely enough to accommodate the vine's growth but tightly enough to keep it from flopping around. Always tie the vine to the wire, not the post, to prevent damaging the vine.

Caring for Tied Vines

Throughout the growing season, monitor your tied vines regularly. Retie any vines that have become loose or have grown too long. Prune side shoots as they appear, leaving only two or three leaves per shoot to encourage fruit production.

In late summer or early fall, after the grapes have been harvested, remove the tying material and prune the vine back to its desired length. This will prepare the vine for the next growing season and help prevent disease.

Tying Vines in Summer

If you miss the early spring tying window, don't worry. You can still tie vines in summer, but you'll need to be more careful not to damage the vine. Choose a calm, cloudy day to tie, and avoid tying vines during periods of high heat or humidity.

When tying in summer, be extra gentle with the vine. Tie it loosely and use a wider tie, such as a strip of cloth or a piece of old t-shirt, to distribute pressure evenly and prevent damage.

In the fall, as the leaves turn color and the vine's growth slows, it's a good time to reflect on the past growing season. Consider what worked well and what you might do differently next year. With proper care and attention, your grape vines will continue to produce abundant, high-quality fruit for years to come.