you would need to attach a batten - lengths of wood, at least 50mm thick, to the wood fence using normal woodscrews attached to the posts which hold the panels in place. Then fix a trellis to the battens as the width of the battens allows for some ventilation - you are right inasmuch as a rose, or any other climber, does better if not totally flat against a solid wall. Sinking a wood post against the concrete fence would look the same as if you had attached it rather than having it free standing - essentially, posts are supports for trellis, wires or panels. A tepee is wider and will cover more of the wall than a pillar and once the rose has reached the top of the fence, you can train it horizontally along or even cascading over to the other side. You will need a posthole shovel, sand and cement and a drill in order to make a free standing trellis support. Conversely, you will only need to sink 4 lengths of rebar, 60cm into the ground to make a pillar. The choice is yours. Both ways will work fine.

Howdy, Jenica! I think you are wise to explore your options. Here, I'm thinking that once the plants sprout leaves, they will be cuddling right up to the fence boards, and maybe fruiting on the other side, through the cracks.... I would probably put the veggies a couple feet in front of a privacy fence. Then I could get to the food. (Let's keep the priorities straight! Heh) The crowded plants would get better air circulation to protect against things like fungus and heat buildup. Also, the fence would not rot from contact with extra moisture for months on end. I was happy with 8x8-inch dog fence stretched between two or three long T-posts (3 for 22 feet worked)--which even an older lady like myself can drive into the ground, if I'm standing on a step stool. I mostly used a 3-pound sledge hammer because to my surprise a determined 10-pound puppy *can* drag off and bury a 4-pounder....

I really think to finish it off you might need to do something like the last pic I posted with the wood archway and gate....without the gate if you don't want that, but something butting up against the edges of the opening like it shows would be a nice finishing touch. You could talk to a local carpenter about building something like that and putting an archway/arbor above - even incorporating a metal one attached to whatever goes on the sides of the opening. You also could go to a decorative iron worker and have them create something similar from all metal. I like arbors with things growing on them; not sure how you'll manage that if that's your intention in that space, since there won't be any dirt - unless you figure out a way to do it on the step side (since you wouldn't want pots you could back into on the driveway side).

Mike, one thing about pictures is that they usually look good when the shutter is snapped, but could be a mess a few months or couple of years later. It is a couple of 2x4s, laid flat @ top & bottom, holding up each trellis in your inspiration picture. They could be toe-nailed/screwed in from an angle, or from the outside of the frame. Paint or heavy stain is covering the nails or screws. And there is nothing growing on them, so no weight of a plant. Even so, in a period of time, I would bet those 2x4s will be sagging with even the modest weight of the trellis. (Look at an aging wood fence and often you will see the boards sagging on the 2x4 rails ... and that is even when they are laid with the 4" running vertical.) I think you'd be a lot better off not worrying about nail or screw heads showing, as it looks like you're going to stain or paint anyway. It would be better to run the supporting members on edge, cleated onto the face of the posts, and use 2x6's or even better, notched 4x6's spanning the top & bottom of your trellis frame. The trellis field members could be 1x2's as in your inspiration picture. If I were you, presuming it's dry, I'd paint all the lumber before you build it, and then touch up the cut ends afterward. (It can take 4x lumber a while to dry, but 1x2's can dry enough to paint in a few days. If you paint or stain heavy, even carriage bolts are not going to be all that obtrusive.