Amazing portable garden in Germany

http://www.flickr.com/photos/39367406@N04/sets/72157623427993366/show/
They couldn't plant in the ground, so everything is in portable containers, plastic trash bags hold fruit trees, plastic milk cartons are stacked to hold vegetables growing in the dirt inside.  Amazing!!  We could so use whatever we have to create gardens wherever there is sunshine.

I hope to incorporate some of these ideas in my home garden and at the church garden.  Needing help with this project - let me know your ideas.