Do you want a herb garden on a small patio or balcony that will water itself? This would work – a living green vertical wall.
I found it at Treehugger. It can harvest rainwater from a gutter down-pipe and the built-in tank can be topped up during dry spells.
Michael Tampilic won a prize with his Vert Rain Terrace at the Rocket 2008 industrial design show.
Treehugger has an article on it here. We intend to experiment with ways and means to design and construct these delightful green walls.