Senna odorata, commonly known as fragrant senna, spreading cassia, sweet-scented cassia, or southern cassia, is a perennial shrub native to forest edges in eastern Australia. It thrives in open woodlands and forest edges, often in areas with seasonal dry periods. This species typically reaches a height of 1.5–2.4 m (4 ft 11 in – 7 ft 10 in) and can sometimes grow into a small tree form. The plant has an upright and sprawling habit with compound leaves that are bright green and glossy. Its bright yellow, cup-shaped flowers are arranged in small clusters or panicles and emit a light fragrance, which is most notable in the late winter to spring when it blooms.

Fragrant senna is valued for its ornamental flowers and pleasant scent, making it a popular choice for tropical and subtropical gardens. It can be used as a specimen plant, in mixed borders, or as an informal hedge. It prefers full sun to partial shade and requires well-drained soil. While it is drought-tolerant once established, regular watering promotes optimal growth and flowering. It is important to note that Senna odorata can be potentially invasive outside its native range, so gardeners should check local regulations before planting.CC BY-SA 4.0