On Monday, June 23, 2014 10:47:09 PM UTC+1, Bob Hobden wrote:

We fitted our whole garden with a seep hose which works very well, you just
use the normal Hozelock connectors and "T" pieces.

There are also gadgets to turn the water on when required, some even attempt to compensate for rainfall, or measure soil moistu
http://www.hozelock.com/watering/aut...er-timers.html
http://www.greenhousesensation.co.uk...ter-timer.html
http://www.gardena.com/uk/water-mana...ater-controls/