Tea Tree

Tea tree (Melaleuca alternifolia) is a highly prized medicinal tree from Australia. The antiseptic oil is distilled from the leaves of this plant. The oil has proven anti-bacterial, anti-fungal and has anti-viral properties which make it valuable for skin infections, burns, bruises, cuts, herpes, warts, yeast infections, gingivitis, and many other conditions that require a powerful antiseptic. It can be applied directly on sensitive tissues without irritation. Easy to grow with attractive, delicate, feathery foliage and heavily peeling bark. Makes an excellent potted tree in zones 4-7. Hardy to zones 8-11.

Tea tree, is native to the wetlands and waterways of eastern Australia, where it grows on Bundjalung land. The Bundjalung people continue to hold deep ecological and cultural knowledge of this plant. Tea tree has long been recognized within Indigenous knowledge systems for its aromatic leaves and their role in cleansing practices, including inhalation, topical application, and infused washes.

The name tea tree entered the story much later, in the late 18th century, when Captain James Cook’s crew reportedly brewed the leaves as a tea substitute while charting the Australian coast. The drink itself was unremarkable, but the name stuck, carrying the plant into European records.

Tea tree’s global rise began in the early 20th century, when Australian chemist Arthur Penfold analyzed the essential oil distilled from the leaves and found it to have remarkable antiseptic properties—far stronger than carbolic acid, the standard of the time. During World War II, tea tree oil was included in Australian soldiers’ kits, used to disinfect wounds and prevent infection in tropical conditions. Demand soared, and wild stands were harvested heavily until plantations were established.

As modern antibiotics took over, tea tree faded briefly from mainstream medicine, but it never disappeared. Herbalists, aromatherapists, and small-scale growers continued to work with the plant, valuing its sharp, cleansing scent and its broad, reliable usefulness. By the late 20th century, tea tree oil returned to prominence—this time in natural skincare, household remedies, and integrative herbal practice.

Tea trees are not frost-hardy. Perennial outdoors in USDA zones 9–11. Grow in a container and overwinter indoors or in a greenhouse in colder climates. The plants require full sun to bright light; tolerates light shade and prefer consistent moisture. They naturally grow in swampy or riparian areas—do not let it dry out completely. Well-drained but moisture-retentive soil; slightly acidic is ideal. This evergreen shrub or small tree responds well to pruning and can be kept compact in pots.