I use CP for my tomatoes, too. Put two T-posts about 5 feet apart, and secured a 5 foot section of CP between them with zip ties, but put it about 2 feet up in the air (tomatoes don't need much support til then, anyway). So it makes it about 6 feet high. Worked great last season, just keep weaving tomato vines in and out of the CP every time you go check the garden! Used some strips of cloth to help anchor them to the CP, too. I would love to get my hands on many more CPs, but they are hard to come by for free around here!