More to explore:
vertical hydroponics this is some thing I need to look into fresh organic foods
^Just the photo with no link to how to, but it looks like you could set this system up pretty easily with a reservoir, pump, fencing, tubing and bottles. A great idea for the garden wall
Urban Food Gardens - This garden featured a vertical hydroponic system made with recycled plastic bottles.
more vertical gardening ideas and inspiration!
A very innovative DIY outdoor hydroponic herb garden...
Deb's Dust Bunny: Prince Charles' Sustainable Garden Party