Growing food in the city isn't as hard as you may think, and here are some tips from colleagues who look after gardening in residential estates.

It's easy to grow melons in a pot on the home balcony, says head Valais gardener Cheng Wing-hong. Fuzzy melons for example just need water once a day and fertilizer once every 3-4 weeks to get a crop over the summer.

People who keep freshwater fish at home can try aquaponics, says Chi Fu Fa Yuen property officer Joe Tsang. Just replace the tank filter with a tray of clay pellets to grow plants without soil, using the fish excrement as fertilizer.