Those who cultivate vegetables or raise fish or bees on the roof, may even make a profit from their efforts. To stimulate further interest in rooftop gardening, the Department of Reconstruction holds regular contests.
對一些在屋頂種菜、養魚、養蜂的人來說，又更提供了一門賺錢的副業。為了進一步提高市民設置屋頂花園的興趣與技術，建設局每年都舉辦一次屋頂花園競賽，選出示範人家，供一般市民觀摩。