Eucalyptus robusta, commonly known as Swamp Mahogany, is an evergreen tree native to coastal areas and swampy margins in Eastern Australia. It can reach up to 30 meters (100 feet) in height and is characterized by its thick, spongy, reddish-brown bark and broad, dark green leaves that contribute to a dense canopy. The white to cream flowers are not particularly showy but appear in profusion during autumn and winter, providing nectar for a variety of pollinators. Swamp Mahogany is a significant food source for the koala, which feeds on its leaves.

Swamp Mahogany is valued for its rapid growth and ability to thrive in wet conditions, making it suitable for use as a street tree or in public areas with moist soils. It is also appreciated for its ability to flower within three years of planting under optimal conditions. This species requires full sun and can tolerate a range of soil types with varying drainage. However, due to its large size, it is not typically recommended for small home gardens. It is invasive in Hawaiʻi and Réunion and naturalized in Florida, spreading in swampy coastal habitats.CC BY-SA 4.0