I started to scoff at this, but then got interested...
This is not, perhaps, just the right thing for the average cottage garden, but I can see variations on this on some specialized gardens with well thought out irrigation design.
Article in Guardian HERE
![http://image.guardian.co.uk/sys-images/Arts/Arts_/Pictures/2007/05/24/sculpture372.jpg](http://image.guardian.co.uk/sys-images/Arts/Arts_/Pictures/2007/05/24/sculpture372.jpg)
The rise of the machines ... Chetwood's installation at the Chelsea Flower Show. Photograph: David Churchill