Acacia semilunata prefers a well drained moderately fertile soil in an open sunny position. This showy plant is both frost and drought tolerant. It is suitable for planting in coastal and inland regions, preferring tropical and sub-tropical zones. Once established it has low water requirements. It responds well to mulch and an occasional deep watering during dry periods, particularly for young plants.
Often this wattle is planted in parks and gardens as a specimen or used along borders for screening. The foliage is attractive all year round. And the long flowering period makes for great winter colour.
This species is similar in general appearance to Acacia cultriformis. However, it is distinguished as having hairy branches, and phyllodes green, rather than the glaucous covering (whitish bloom) on the phyllodes which is very evident on Acacia cultriformis.