In an urban garden space is at a premium and vertical space omes to play a large part in raising productivity. Many crops can be stacked eg corn growing up and pumpkins along - something i am doing on my guerrilla garden plots (photos of them to come)
This is something I worked on when i had spare time in the holidays it works like this, water comes off the tree hut into a gutter then into the yellow container you see below. From their is goes into the hose which has a few holes in it over the passion fruit to constantly drip irigate it. It is working fine at the moment but I have some improvements to make eg more plants and pots up the tree and a larger reservoir.
Grape vine growing through a Kawakawa tree and a Fig tree and scrambling over the garage roof.