Can you pick out the three separate companion plants here? This is in the new potato bed, right next to the compost bin in the middle. On the far left is a Heavenly Blue morning glory, in the center are the large,broad leaves of the cucumber, and on the right, the long narrow leaves of a potato plant.
The idea is that the morning glory will grow up over the compost bin making a column of gorgeous blue flowers, shading the cucumber while providing them an additional trellis to climb, and eventually covering the full-grown potato plants, shading them from the late summer heat. Both the morning glory and cucumbers have a shallow root structure, so they won't interfere with the potatos and their underground crop.
And for anyone who is wondering, no, we haven't finished the pond/water system yet. The best laid plans have been run amuck by car repair bills.