市區內遊人眾多，空間狹窄，沒有太多的空間容納一棵樹，就算有，也只能是一丁方位置．選種路邊樹是一門學問，因為適合人類環境的樹木不多，特點要樹冠狹窄，樹幹畢直，泥膽細小，生活在劣質泥土中而不死．

圖中的是在旺角鼓油街的2棵白千層，種在水渠邊及在電 話線蓋旁， 根的發展空間有限．白千層是澳洲大樹種，能生長在惡劣環境下，代價是長不高，生不大，違反它本身的樹性．

樹藝中講求"right tree, right place"，在惡劣的生存環境下我們發揮專業判斷：選擇不種！

Our urban area is filled up with pedestrians and no room for any trees. Space is only squeezed for them. It is a complicated subject to select the right tree in a crowded area. Only those with narrow crown, straight trunk, small root ball and be capable to survive under poor soil are selected.  

The pictures have shown two Paper-bark trees planted in Soy Street in Mongkok. They are located besides the drainage opening and electrical wire cover. Obviously there is not enough space for the root to stretch out. Paper-bark tree is a large tree from Australia, it extremely tolerant adverse environment. However, it has violated its own nature as it never grows taller or bigger.  

Arborist insists 『right tree, right place』. Under adverse site condition, a professional judgment is: no planting please!

translated by Paula Wong