Lemon-Scented Gum (Corymbia citriodora): Fragrant Eucalyptus for Warm Regions

Lemon-scented gum, formerly Eucalyptus citriodora, is a tall, graceful evergreen tree native to Queensland, Australia. Its leaves emit a strong lemon-citronella fragrance when crushed, and its smooth, powdery white bark (often with patches of gray, pink, or copper) makes it one of the most ornamental eucalypts.

Botanical Profile

• Family: Myrtaceae (myrtle family)
• Genus: Corymbia
• Species: citriodora
• Synonyms: C. citriodora var. citriodora, Eucalyptus citriodora

Features

Grows 50–100+ feet tall with a straight trunk and open, pendulous crown. Leaves are narrow, lanceolate, lemon-scented. Bark sheds in thin strips, revealing smooth, white to pinkish-gray surface. Flowers are white, in clusters, winter to spring. Essential oil (citronellal) is commercially extracted for fragrance and insect repellent.

Culture

Full sun, well-drained soil. Drought-tolerant once established. Subtropical to tropical (USDA zones 9–11); damaged below 25°F. Fast-growing. Can be coppiced for foliage production.

Uses

Specimen, shade tree, avenue, essential oil production, timber (heavy, durable). Invasive potential in some regions (e.g., Hawaii, South Africa); check local guidelines.