Those things took off! Nice photos.

I was thinking about the square foot concept. Crop intensive farming is common in regions with limited resources. Many of the seed varieties, or traits, are specifically designed for particular conditions. In this case, I think the type of plant we are growing needs a bit more room. The leaves may grow 24 - 30 inches long. Guestimating angle and leaf curvature, that puts the approximate spread for the stalk at better than three feet. I'm not no math wiz, but I think one square foot may be a little tight... More important, this is a leaf crop, as opposed to root or seed crops that seem to be better suited to intensive methods. Just my .02.

In any case, you're miles ahead of me in prepping the ground. I'm thinking of just plowing up the neighbors yard.