Corymbia citriodora - Lemon Scented Gum

Corymbia citriodora – Lemon Scented Gum

Habit and Habitat:
Corymbia citriodora, commonly known as Lemon Scented Gum, is a tall, elegant tree native to Queensland, particularly the open forests of the central and northern regions. It is well adapted to subtropical and tropical climates and is most often seen gracing streetscapes, parklands, and large properties where there’s room for its striking vertical form. In its natural habitat, it grows in well-drained, gravelly or sandy soils on ridges and slopes.

Place in Local Habitat and Ecosystem Distribution:
In its native range, Lemon Scented Gum provides valuable canopy habitat for birds and insects. Its nectar-rich flowers feed native bees, birds, and flying foxes, while its smooth white trunk is sometimes used by tree-dwelling marsupials for shelter. It is not endemic to southern Australia but performs well in temperate zones with warm summers, where it has become a popular ornamental planting.

Planting Companions:
Due to its height and open canopy, it pairs well with understorey plants such as Lomandra longifolia, Hibbertia scandens, Brachyscome multifida, and groundcovers like Myoporum parvifolium. Surrounding it with grasses and smaller shrubs can help create a layered native garden with good airflow and light penetration.

Human and Wildlife Uses:
The foliage contains citronellal, giving the tree its strong lemon scent and making it a natural insect repellent. The essential oil extracted from its leaves has antibacterial and antifungal properties and is used in perfumes and cleaning products. Wildlife such as honeyeaters, lorikeets, and gliders are drawn to its flowers, particularly during summer blooming periods.

Care Instructions:
Corymbia citriodora requires full sun and well-drained soil. It is drought-tolerant once established but benefits from occasional deep watering during dry periods. Avoid planting close to buildings or small gardens, as its mature height and extensive root system require ample space. It can be frost-sensitive when young, so protection may be needed in cooler climates during early growth stages.

Size, Height, Width, Flower and Leaf Characteristics:
This species can grow to an impressive 25–40 metres tall and 10–15 metres wide, forming a tall, upright crown. The bark is smooth and pale, often shedding in patches to reveal creamy pink and grey hues beneath. The lance-shaped leaves are strongly aromatic when crushed, releasing a sharp lemon scent. Clusters of small white flowers appear in summer to early autumn.

Latin Etymology:
The genus name Corymbia refers to the corymb-like (flat-topped) arrangement of its flower clusters. The species name citriodora means "lemon-scented," referring to the distinctive fragrance of its leaves.

Traditional Uses:
While not one of the primary bush medicine trees, the aromatic qualities of the leaves have historically been valued for repelling insects, smoking ceremonies and making aromatic infusions. The tree’s wood has also been used in construction and fuel.

Planting Guidelines:
Best suited to large gardens, rural properties, or open urban spaces, Lemon Scented Gum should be planted with plenty of room to accommodate its height and root spread. Ensure full sun and minimal soil disturbance near the base. Not ideal for small residential blocks, but in the right setting, it is a spectacular feature tree with immense landscape value and a beautiful citrus scent that carries on the wind.