We live in an apartment and are growing watermelons and cantaloupes, among other things, and want to grow them vertically but I have seen many trellises and am not sure which is best, mostly what is best for an apartment patio. I had planned just a basic trellis against one side of the side of the patio but then I started researching and saw A-Frame trellis and some kind of shelve trellis, but not sure the benefits of each or about how much room it usually trellises. We have three watermelon plants in one pot and two cantaloupe plants in another pot.