Tolerance to salinity is moderate. A red flowered bottlebrush with a height potential of 3 m and more of an arching growth profile is the C. citrinus variety, Splendens. This is a selection from an earlier variety, Endeavour. For screening use, Splendens is likely to require more frequent attention than the Willow bottlebrush if it is to retain its lower foliage. Several of our native cassias are useful garden subjects.
Silver cassia is one of the most versatile.
Carrying silver grey, needle-like compound leaves and a rich crop of bright yellow flowers over winter, this plant is well suited to most free draining soils. Grow silver cassia from seed or plant out as a seedling less than 30 cm in height. It needs full sun to develop a compact growth form and to flower profusely. It will grow to a height of up to 2 m and a width of 1.5 m. Light pruning can prolong flowering. Limit heavy pruning to winter while plants are growing.