Home / Earth / Building a Wire Trellis
How to Build a Wire Trellis for Grapes

Building a Wire Trellis

Last Updated on

As some of you might have seen last week on Facebook, I was busy building a wire trellis for the latest addition to my garden. A wine grape! While I realize that it is fairly late in the year to be planting a grapevine, (usually this should be done in the spring to give the plant time to develop a strong root system) and probably won’t get much in the way of grapes this year, I was super excited when I was gifted this wine grape from my Uncle Bruce! I am not entirely sure exactly what kind of grape it is, but for the purposes of building a trellis it really doesn’t matter.

A DIY Wire Trellis For Grapes

Do Grapes Require A Trellis?

Traditionally in Europe, grapes vines were coppiced instead of trellised. This essentially means the vine was grown without a trellis for the grapes to grow up, and instead the entire plant was pruned back to the main stem every few years, allowing new shoots to grow from the base of the plant.

Coppiced Grapevines

The end result looks like a small bush growing 3 or 4  feet above the ground. Since grapevines only bear fruit on first-year shoots, coppicing ensured that every year new shoots would grow from the main stem and produce an ample harvest. Because the root system was already fully developed, these new shoots would grow remarkably quickly.

The advantage to having a grape vine growing up a trellis is that, while you still need to prune the vine back to the major stems, you can expose the plant to more sunlight and airflow, resulting in a healthier and more balanced plant.  

Trellising grapes was initially introduced to help reduce disease among the plants as trellising provides better airflow and sun exposure. This method of growing grapes is also more controlled allowing for the production of more fruit.

Building Your Own Wire Trellis

So how do you build a trellis and what kind of trellis should you build? Well that entirely depends on what you want to do in your garden! I am planning on using the trellis as a privacy screen on the edge of the property line, as well as providing a place for my grapes to grow and provide lots of fruit for me!

I am a firm believer in growing your own produce, since outside of requiring a little initial work, it’s well, free! You could build a trellis using a piece of lattice, you can construct an arbour style gate, you can even use a fence line to help train your grape. Seeing as I don’t have a current fence on the property line, I decided to go with a more traditional wire trellis.

Materials Needed

For this DIY wire trellis project I used:

  • Two 4x4x8 fence posts – which I cut a 22-degree angle at one end
  • A single 2x4x10 – for the  top “plate”
  • About 50ft of galvanized steel wire (the stuff used to put up chain link fencing)
  • 4 turnbuckles
  • 4 J-hooks
  • and 4 eye screws
  • 3 bags crushed pothole gravel
22 Degree angle cut at the top end of the post

I also bought a few bags of crushed gravel which went into the post holes. This helps water drain away from the wooden posts which helps reduce rotting. The gravel has the added benefit of creating a more compact base for the posts to stand in.

Instructions

1. I started by digging two 2ft deep post holes for my fence posts 10ft apart. Since I did not have access to any heavy machinery, I dug these by hand. Let me forewarn you, it took about an hour to dig just two holes! I made the holes about 12 inches in diameter, giving me enough room to get a spade down into it, yet at the same time keeping it small enough to ensure a snug and secure base for the posts. Since I wanted a 6ft high trellis I dug the post holes to a depth of about 2.25 feet. The extra depth will be explained shortly!

2.25 foot deep post holes

After digging the post holes for the wire trellis, I went in search of some flat rocks (of which there are fortunately plenty) in my yard. These rocks sit on top of about an inch of crushed gravel and will serve as the base for which post will stand on in the hole. It allows for drainage as well as a solid foundation, for the inevitable freeze-thaw cycle that happens every year.

prepping the post holes with crushed gravel

2. I placed the fence posts in the holes and filled the holes three-quarters of the way with crushed gravel. I made sure to use a leftover piece of 2×4 to stamp down the gravel and create a really nice compact base. I could tell the post was already starting to feel quite secure and had minimal movement.

Related:  Kick Start Your Garden By Starting Seeds Indoors

This is the time when you want to use a level and ensure your fence posts are straight! After you fill in the rest of the hole with excess dirt and compact that down as well, your fence post is essentially set in place and you will not be able to straighten it out without having to dig up the entire shebang.

3. Once the posts were securely planted in the ground and level, I screwed the 2x4x10 to the top of the posts. The entire frame almost instantly became rock solid and there was hardly any wiggle left at all. As I had mentioned previously, I installed the top bar at a 22-degree angle. This allows water to run off the top bar of the trellis and reduces the chance that the wood will rot.

4. The next step involves drilling pilot holes 1 foot apart all the way up the end posts, on the inside of the frame. Into these pre-drilled holes, I screwed the J Hook on one end and the Eye Screw on the other. This gives me a solid anchor to which I can attach my steel wire on one side.

The J-hook allows me to attach the adjustable turnbuckles on the other side of the frame. This allows me to tighten the wire as needed if the ground shifts or the vine becomes too heavy and the wire begins to sag. I alternated on which side I installed the turnbuckle, to evenly distribute the force the wires would exert on the posts in the frame.

Tension system for wire trellis

After installing the wire and tightening them with the turnbuckles, all that was left was to dig a hole for my grapevine and transplant it! This was arguably the easiest part!

How to Build a Wire Trellis for Grapes

You can find more DIY gardening tips and tricks in the Gardening section of the blog. I will periodically be posting about my adventures in growing my own produce to use in various recipes (such as growing garlic to use in this Basil & Garlic Scape Pesto)  and how to plan for your first vegetable garden.

Did you find this guide useful?? Comment & Rate it below, then tag me on Facebook & Instagram: @earthfoodandfire . For more DIY gardening tips & from scratch recipes follow me on Instagram & Pinterest

Building A Wire Trellis

A simple weekend project for building a wire trellis, ideal for growing grapes, cucumbers, roses, or any other climbing plants.
Project Time 2 hours
Total Time 2 hours
Author Chef Markus Mueller

Tools Needed

  • Measuring Tape
  • Shovel or Spade
  • A Level
  • Screwdriver
  • Drill
  • Wire Cutters
  • Miter Saw

Materials Needed

  • 2 each 4"x 4"x 8' fence posts which I cut a 22-degree angle at one end
  • 1 each 2"x 4"x 10' wood peice for the  top "plate"
  • 50 ft galvanized steel wire the stuff used to put up chain link fencing
  • 4 each turnbuckles
  • 4 each J-hooks
  • 4 each eye screws
  • 3 bags crushed pothole gravel

Instructions

  • Start by digging two 2ft deep post holes for the fence posts 10ft apart. Make the holes about 12 inches in diameter, giving you enough room to get a spade down into, yet at the same time keeping it small enough to ensure a snug and secure base for the posts.
  • After digging the post holes for the wire trellis, place about an inch of crushed gravel in the bottom of the hole with a flat rock on top. This acts as the base for the posts, and allows for drainage.
  • Place the fence posts in the holes and fill the holes three-quarters of the way with crushed gravel. Stamp down the gravel with your boot or piece of 2×4.
  • Use a level and ensure your fence posts are straight! Once straight fill in the rest of the hole with excess dirt and compact that down as well, your fence post is essentially set in place and you will not be able to straighten it out much, without having to dig up the entire shebang.
  • Once the post sare securely planted in the ground and level, screw the 2x4x10 bar to the top of the posts.
  • Once the top bar has been secured, drill 4 pilot holes 1 foot apart all the way up the end posts, on the inside of the frame. Screw a J Hook into every second hole on one side and the Eye Screws in every second hole opposite a J-hook.
  • Install the wire stretching it from eye hook to on one end to a turnbuckle on the other. Attach the turnbuckle to a j-hook and tighten the wire.

Please note : We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

4 Comments

  1. Chris Phillips

    Why did you screw the hooks in inline with the direction of tension? Should’ve put it on the side of the post, so tension would not be able to pull the bolt out of the wood.

    • Hey Chris, I don’t really think that that would be a problem as the top cross beam will prevent the tension screws from pulling the posts together. I doubt you would get so much tension that you would pull a 2 inch screw clean out of the post. My trellis is still standing 3 years later with a now mature grape vine, and have had no issues, I’ve had to re tighten the tension screws but that’s mostly because of movement from freeze/thaw cycles in the early spring. The eye hook screws haven’t budged at all.

  2. Could something similar be used for raspberry plants?

Leave a Comment

Your email address will not be published. Required fields are marked *

*