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. Overwatering can restrict root growth and cause death.
Salt tolerance is only moderate.
Fiddlewood is a vigorous and hardy shrub with shiny green leaves that turn coppery as winter approaches. It carries a mass of fragrant small white flowers over summer. Where a dense screen or hedge is required, prune fiddlewood heavily in summer or winter. Cut back over-heavy top growth to maintain foliage density at ground level. Plants are deciduous in colder areas over winter.