问:我一株大岩桐越长越高,株形难看,这是怎么回事? 广东谭卫阳答大岩桐为半阴性植物,生长期间要适当遮荫光线太强则生长缓慢,叶片变厚边缘发黄;光线太弱,氮肥过多,温度较高时则易徒长,节间变长,越长 Q: I am a larger Rock Tong taller tall, ugly shape of the plant, how is this going? Guangdong Tan Wei Yang Sitang Tong is a semi-negative plants, shade should be properly grown during growth is too slow, thickening of the edge of the leaves yellow ; Light is too weak, too much nitrogen, the temperature is easy to leggy, internodes become longer and longer