A polyculture of acid-loving plants including blueberries, lingonberries and Arctic raspberries, lupine, yarrow, and a few annuals: potatoes or yams, sorrel, endive and escarole. Hopefully, the poster isn't too big to open or download.

I should add that the vaguely rendered plants in the background are annuals (beans, peas, squash, etc.) that will grow on the 7' trellis "overstory" in adjacent beds that will have a more typical garden soil pH of 6.0-7.0. To avoid too much visual clutter and confusion, they're not an official part of the polyculture design.