Even if your balcony space is more streamlined than usual, vegetables can still fit in. The overhead here isn't ideal as a support for vegetables, but it does create a window effect, with the planter below serving as a window box, only this time on the inside of the room. Evenly spaced dwarf fruit trees or climbing vegetables (use contemporary steel supports rather than bamboo or wood) can be planted to create a grid effect that frames the vista beyond; then fill in below with edibles and other plants. The plants will benefit from their daylong exposure to the sun, while you can relax in a more shaded spot.