FINAL EVALUATION........Turns out this, in theory, is a good idea, but left much to be desired in practice. The okra stalled in growth at about 1 to 1 1/2 feet tall. The watermelons got to softball size then stalled and/or cracked open. The squash......well, we won't even go there. The thought that the tops of the containers being a little above ground would help keep grass out turned out to be, just, a brain fart. IF I were to try this experiment, again......I would cut the containers off at 6 inches, putting 3 inches in ground, 3 inches above, giving the plant roots room to expand horizontally as well as vertically.