Essential Oil - Citronella
Essential Oil – Citronella
Botanical Information
Citronella (Cymbopogon nardus) belongs to the Poaceae (Gramineae) family and is also known as Sri Lanka Citronella or Lenabatu Citronella. This tall, aromatic perennial grass originated from the wild “mana grass” of Sri Lanka. It forms dense clumps of slender green leaves that release a fresh, lemon-like fragrance when crushed, making it one of the world’s best-known aromatic grasses.
Habitat and Cultivation
Citronella is native to Sri Lanka, where it has been cultivated commercially for generations, particularly in the southern regions of the country. It thrives in warm, tropical climates with abundant rainfall and well-drained soils. Today, citronella is grown extensively throughout tropical regions for essential oil production.
Related Species
A closely related species, Java Citronella (Cymbopogon winterianus), is widely cultivated in Indonesia (Java), Vietnam, Africa, Argentina, Central America, and other tropical countries. Java Citronella generally produces a higher yield of essential oil and is considered superior for perfumery due to its richer content of aromatic compounds. Numerous other fragrant grasses within the Cymbopogon genus are also cultivated for their essential oils.
Traditional Uses
Citronella has long been valued in traditional medicine across Asia for its aromatic and therapeutic qualities. The leaves have been used to help relieve fever, digestive disorders, intestinal parasites, and menstrual discomfort, while also serving as a natural stimulant and insect repellent. In Traditional Chinese Medicine, citronella has also been used to ease rheumatic pain and promote overall well-being.
Therapeutic Actions
Citronella essential oil is traditionally regarded as antiseptic, antispasmodic, antibacterial, deodorizing, diaphoretic, diuretic, emmenagogue, febrifuge, fungicidal, insecticidal, stomachic, tonic, and vermifuge. It is especially recognized for its ability to repel insects while supporting skin health and general wellness.
Extraction Method
The essential oil is obtained through steam distillation of fresh, partially dried, or fully dried grass. Java Citronella typically yields approximately twice as much oil as the Sri Lankan variety, making it the preferred source for commercial production.
Aroma and Characteristics
Sri Lanka Citronella essential oil is a yellowish-brown, mobile liquid with a fresh, powerful, lemony aroma. Java Citronella oil is generally colorless to pale yellow and possesses a smoother, woody-sweet citrus fragrance, making it particularly desirable for perfumery. Citronella blends well with geranium, lemon, bergamot, orange, cedarwood, and pine essential oils.
Major Chemical Constituents
The principal components include geraniol, citronellal, geranyl acetate, limonene, and camphene. Java Citronella is especially rich in geraniol (up to 45%) and citronellal (up to 50%), whereas the Sri Lankan variety contains a higher proportion of monoterpene hydrocarbons.
Safety Profile
Citronella essential oil is generally considered non-toxic and non-irritating when properly diluted. However, some individuals may experience skin irritation or allergic dermatitis, particularly those with sensitive skin. Because of limited safety data, it is best avoided during pregnancy unless recommended by a qualified healthcare professional.
Aromatherapy Uses
In aromatherapy, Citronella is widely used to reduce excessive perspiration, balance oily skin, and serve as a highly effective natural insect repellent. Traditionally, it has been blended with Virginia Cedarwood oil to help protect against mosquito bites. The oil is also used to support the immune system during colds, influenza, and minor infections, while its uplifting aroma may help relieve fatigue, headaches, migraine, and neuralgia.
Other Uses
Citronella essential oil is extensively used in soaps, detergents, household cleaners, industrial fragrances, and personal care products. It is a key ingredient in mosquito repellents and other insect-control products designed for homes and gardens, helping deter mosquitoes, moths, ants, and fleas. Sri Lankan Citronella oil is also used as a flavoring ingredient in selected food and beverage products, while Java Citronella serves as an important commercial source of natural geraniol and citronellal for the fragrance and flavor industries.
