Now I bring to you a trellis for my cucumbers and canteloupe. These could be used for any vining crop (ignore the PVC in the background, those were for my hoop houses:
There is some onion in the way of my cucumbers right now, but I expect to be pulling those soon enough.
From the side view, you can see that these only take up about 12-18" of horizontal garden space; but give 7 total feet of vertical space.
They are made from 1 1/2" x 1/2" cedar furring strips cut to 4' in length. We then cut an 'arrow' on the ends to make them easier to drive into the ground.
We drilled a screw hole into the other end of each stake, so that the legs of the trellis were moveable.
Thus, we can make this system wider or narrower as we see fit.
Finally, we tied some garden netting to the stakes as supports for the growing vines. These trellis give us about 3 1/2' of vertical growing height on each side for a total of 7'.
It cost me about $5 to make and should last several growing seasons. The best thing about it is that it folds flat for easy storage!