An excellent instruction video on how to use a post and wire trellis system for your tomatoes from Veggie Gardening Tips. I have used this system in the past and it stands up very well to the weight of the tomatoes, even when I forget to prune off the suckers. The only modification/addition that I’ve done is to have a side support for the terminal posts. Otherwise, the tomatoes tend to pull the end posts over.
Be certain to check the video out for more specifics.
