The tree has a trunk with white papery bark and slender semi weeping branches that form a rounded crown. It has mid green lanced-shaped leaves that are pink when young and the small yellow-white bottlebrush-like flowers appear from spring to summer. 

Hardiness zones 9 to 11

Callistemon salignus is naturally found in Australia growing on the coast and lower mountains from New South Wales to Queensland appearing along creek banks. 

It prefers a damp but well drained moderately fertile sandy to light clay soil in a sunny to semi shaded open position and is and slightly drought tolerant but frost tender.

Willow Bottlebrush is a hardy small tree that is grown for its flowers and its bushy habit. It is suitable for small gardens and is planted along borders for screening and to attract birds. It is also used for erosion control along water courses or used in coastal regions tolerating 2nd line salt. It is mass planted as a windbreak in large gardens or bushland settings establishing in 2 to 3 years and is moderately deer resistant. ID 147

Note:
Be careful when selecting a position as the roots can clog drains.

Callistemon (ka-LEE-stay-mon)  salignus (sa-LIG-nus)

'Callistemon': from Greek kallistos + stemon - beautiful stamens; 'salignus': like a willow (refers to the weeping habit).

Myrtaceae (mir-TAY-see-ee)
Myrtle, Eucalyptus, Clove and Guava Family