Outdoor Grape Vines

By | January 24, 2017

My name is david handley, i’m with the university of maine cooperative extension, and we’re here to talk about how to prune and train a young grapevine. This is a vine that was planted last spring. We got it from a dormant plant, or rooted cutting, and you can see the original part of the planting right here. This is what we got from the nursery, with a good root system under it. We planted it, and we had a bud break and some vine growth. This is last year’s growth right here. This was a green shoot. Typically, you may get.

More than one shoot developing. you may have several buds on here. we want to prune this back to one strong vine, your strongest one. We’re going to arrange for that to be tied up to a trellis, because this particular vine is what’s going to become our permanent trunk, or the permanent part of the plant that’s going to be with us for the life of the planting. We want to make sure it’s the strongest of the vines that we can choose from. Any other one that developed that’s very weak, we can just cut that out, select our best one.

The time of year to make these cuts are when the canes are dormant, and this is going to be really any time after the new year, until they bud out in late March, early April. We hope in the first year that we get enough good growth that we can tie it to the lower trellis wire. Typically here in Maine, we’re going to be pruning to either a four arm kniffin training system, or an umbrella kniffin training system. Those trellises consist of two wires, one set at about two and a half feet, and a second.

Wire set at about five feet. we hope in the first year that we’re going to get enough good growth to reach at least the bottom wire, but in order to make sure it’s growing straight, you can see we supported this with a small bamboo pole. Any kind of planting stake will work, and we just tie that vine up as it grows, rather than let it grow along the ground where it can get rot problems, and not develop a nice straight growth like we want. We tie it up, just like you’d tie up a beef steak tomato, get the.

Growth that you want. as i said, we’ve got pretty good buds here, reaching up to the first wire. You can see that I actually make it to the top wire, but you can see the growth up here is very scrawny and spindly, and isn’t really going to lead to a good, strong trunk. I’d rather actually start new growth for reaching to this top wire for next year. What that means is that I’m actually going to cut this off here, rather low, to try to get this bud here to break and give me a much.

Stronger shoot to develop my trunk to the top wire next year. i can just take that there, and then, instead of using the bamboo pole this year, I can just tie it to the wire. This bud will hopefully break, and give me a good, strong shoot, that I’m going to reach the second wire next year. Of course, these buds lower down will also break, and if this one happens to be weak, I may select one of these. But, if this bud does turn out to be a strong shoot, I’ll be cutting these off next winter and getting my single trunk back.

Up to the top wire. next year, when this does reach the top wire, eventually what we’ll be doing is taking one year old cane, and either draping it over this top wire and connecting it to the bottom wire in an umbrella kniffin, or we’ll be taking one cane at the top wire on each side, and one cane at the bottom wire on each side, to create four arms of one year old growth, for a four\uc0\u8209 arm kniffin system. Both systems work pretty well for concrete type grapes here in a cold climate like Maine.

Basics of a Grapevine Trellis

Im lee tyre with the northampton county cooperative extension service, and were going to talk about constructing grape vine trellises. A grape trellis is a structure that holds the vines off the ground, allowing sunlight in evenly, and making management and harvesting of the grapes easier. There are several different types of trellises. What weve constructed here today.

Is a very simple one, whats called a high cordon grape trellis. the grapes we are training to the trellis today are an American type, and they prefer to grow downward. So what weve done, is we are going to train the cordons, the heavy limbs of the grape vine, along the top wire here, and as they grow, theyll send laterals downward. And well probably come in later and add a second wire, here below it.

As you can see here, older, mature vines can become quite large, putting a good deal of strain on the trellis. Since we want these structures to last for a long time construction materials is an important consideration. You want to make sure you use materials that are resistant to decay, and can support the weight of mature vines. Once you have selected your materials, its time to begin construction. When setting your end posts, make sure they are anchored well. With a short trellis, this could be a.

4 by 4 post sunk 2 to 3 foot into a clay soil. With longer runs, or looser soils, setting the posts in concrete or additional bracing may be required. With a long enough run, even very large posts like this one require extra bracing to help support the load. Of course, the last main part of a trellis is the wire. Again, you want to select a heavy enough wire to support your vine for years.

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