The rise of rooftop gardens in big cities

Rooftop farming is gaining more and more popularity as space dwindles in urban areas. The beauty about it is that it utilises minimal spaces therefore great with urban dwellers.

At the top of a three-storey building in Hong Kong, with car horns blasting on the streets below, Jim Fung teaches a dozen students how to thin out choi sum vegetables.

“Always use the resources you have,” the instructor said as he placed shredded office paper into soil-filled plastic crates and wound string around bamboo sticks to make support frames.