That's correct, the wire is the trellis. I vary the height depending how a plant behaves. For container size if it's 1 plant I use a#7 pot, with 2 I use #5's (black pro-can). I always start by topping the plant and taking a few lower branches for clones and to start pushing the energy to the top. Usually takes about 8 weeks of veg for the size plants I like including 2 week for the cuts to root. Once they're in flower about 7-12 days I take all the non essential growth from under the trellis.