Callistemon viminalis is a tree that typically reaches a height of about 2 to 5 meters. It belongs to the Myrtaceae family. It is characterized by its drooping flower spikes adorned with vibrant red flowers that sway in the wind, creating a sense of peace and tranquility. Special care requirements for the Weeping Bottlebrush include regular pruning to maintain a well-shaped tree. The flowering period occurs between March and May, while the fruiting period occurs in August. 

Reference: https://www.greening.gov.hk/en/community-outreach/qrcode-tree-labels/index.html