(duplicate post in vegetable forum).

I saw this idea on Pinterest re: supporting tomatoes. Last year we grew San Marzanos, Better Boy and Early Girl- all huge plants that broke all manner of stakes and cages. This year I was determined to do better and lose less crop. Hence the "horizontal trellis."

Here's where I need help: I don't need quite this many tomatoes. What can I plant that will appreciate the support but is large enough to fill the space without extra supports? I don't think beans or peas will work because their vines are so fine and prefer to "wind" rather than bush out. The boxes are 12" square.

Cucumbers? Brussels sprouts?

Should be tall and annual (no asparagus unfortunately) because I like to rotate crops in raised beds. Full sun (10 hrs).

Thanks!!