Callistemon viminalis ‘Hannah Ray’ ‘Weeping Bottlebrush’ Native to Australia, this cultivar is catching people’s attention all over the world. This evergreen shrub is tough and grows from 15 to 30 feet in height. The leaves are green, aromatic, and soft to the touch. ‘Hannah Ray’ grows quite fast and has a very distinctive growing habit. Bright red flowers appear in mid spring and make this shrub even more attractive. This plant is drought tolerant once established. Grows and thrives in full sun.