My normal drop and drag method of uploading photos has gone bonkers. I guess some browser, operating system or something has been "improved" to make the world better so we need to keep learning new techniques. As you may be able to tell, I get frustrated with this type of thing occasionally, especially on just one cup of coffee. Hopefully it is just a glitch. I did manage to get one to upload in a way that I can add text. I just can't add other photos for details.
This is from last year. Instead of those wooden stakes I'm using metal T-posts this year. In my silty loam soil they are not that hard to drive and not that hard to take back out at the end of the season. And they don't rot. In rocky soil they may become more permanent. Something to consider Steve.
I cut the bottom horizontal off a cow panel so I have "spikes" to push into the ground. I also cut them into roughly 8' lengths instead of leaving them the full 16' so they are easier to handle. Since one of those verticals is at exactly 8', I wind up with half about 7-1/2' long and half 8-1/2' long. The open space is about 24" wide, 12" on each side of the tomato plant.
I push the points into the ground then wire the panels to the stakes. I extend the panels maybe 12" to 18" past the end tomato in the row. If the exact row length doesn't work out (and it won't) I leave a little gap between the panels where they meet. This gives me a cage just under 4' high. Not high enough. So I take a second 8' length of cow panel and wire that to the top of the other, overlapping maybe 18" to 24". The stiffness of the cow panel will hold it up right. So now my cage is about 6' high.
To stiffen the top, I take 24" pieces of ripped 2x4's so I have 2x2's and wire those across the top to hold it open and keep it closed.
I prune back to two leaders, one on each side, and tie or weave the tomatoes to the sides of the cage. I normally have to tie the leaders to the side to get them in position but if I stay on top of it I can normally weave them through the openings in the panel after that. I don't always stay on top of it.
The plants are about 24" apart in the row. I try to keep them pruned off maybe 18" high, mainly to open the bottom up to a little air flow, and mulch of course. I only grow indeterminants so pruning doesn't hurt, I hope. Some of my varieties may not reach the top of the cage but some will overflow the top and reach all the way back to the ground.
I normally leave 5-1/2 feet between the row of tomatoes and the next row over. Usually I have peppers, eggplant, maybe okra in one of the neighboring rows, things that don't spread a whole lot, while the row on the other side is maybe green peas, onions, maybe garlic, a spring crop that comes out before too late in the summer. That 5-1/2 feet gets mulched too. Really keeps the weeds and grass down.
The flat cow panels store really well. I used to just lean them against my garden fence. The problem with that is grass and weeds grow up in them in the spring so I have a mess to clean up when I finally use the panels. Now I carry them to a shed where I lean them against a wall. That's another reason to make them 8' long instead of leaving them 16', carrying them plus shed length. The T-posts or stakes are just piled up.