I had planed to make a potato bed. I haven't gotten to it yet, I can share my plans but, not how successful they would be.
Plant 4 vertical posts in the ground making a square, about 3-4 feet apart and 4 feet high, I was thinking 4x4 but 2x4 might work as well. Make mini beds frames out 2x6, 2x8 and 2x10 boards, that stack around the posts. each mini bed frame would be painted in a different color ('cause I'm and artist and I need color)
I'm still waiting to have sufficient wood, not a lot of construction going on in my neighborhood so reecycle hasn't yet provided enough lumber. If you decide on this method I want feedback.