Vetiver (Khus) Oil

Origin & story

The grass is native to India and sits in the same family as sorghum; the older botanical name Vetiveria zizanioides still turns up on trade paperwork. India has two genuinely distinct types. The wild, free-flowering "Bharatpur type" of the north (Rajasthan, Uttar Pradesh) yields the celebrated ruh khus, while the non-flowering cultivated type grown across the south — Kerala, Tamil Nadu, Karnataka and Andhra Pradesh — is the volume workhorse rather than the top perfumery grade. So the Western Ghats and South India are a real and large growing base for khus, but more for oil quantity than for the premium northern oil.

How it’s made

Only the roots carry the oil, so nothing above ground is distilled. Plants are lifted after roughly a year and a half in the ground, and the roots are washed free of soil, dried, chopped and then steam-distilled. Distillation is slow and can run for the better part of a day, longer still on traditional wood-fired stills. The traditional khus attar of Kannauj is made by the old deg-bhapka method, distilling the vetiver vapours onto a sandalwood base.

Sourcing & cultivation

Khus is hardy and undemanding — it copes with poor, waterlogged or saline ground, and its deep binding roots make it a standard grass for stabilising bunds and checking soil erosion. It is normally raised from root slips rather than seed, especially the sterile southern type. In practice the south gives heavier root and oil yields, while the northern wild type gives less oil of higher value. CSIR-CIMAP (Lucknow) has released improved varieties such as KS-1 (a Bharatpur selection), KS-2, Dharini, Gulabi and Kesari.

Grades & quality

Buyers judge vetiver on colour (amber to reddish-brown), odour and total vetiverol content. The compounds alpha- and beta-vetivone together with khusimol are treated as key markers of perfumery quality. Optical rotation also helps separate origins: North Indian khus oil is laevorotatory (negative rotation) and richer in the heavier carbonyls, and it is reported to carry a rare terpenoid, khusilal, whereas southern and most world oils are dextrorotatory.

Uses & applications

Vetiver is above all a perfumer's fixative and base note, reportedly present in a large share of Western fragrances and especially men's scents, and it also goes into soaps and cosmetics. In India the pure oil (ruh khus) and khus attar are prized in their own right. Khus essence flavours the familiar green khus sharbat and syrups used in lassi, milkshakes and ice cream. The woven roots themselves are made into khus tatti screens and mats that are wetted so the passing air is scented and cooled — a long-standing summer practice in the plains.

For buyers & the trade

India is a niche origin for vetiver oil rather than a bulk one — Haiti leads on volume and Réunion "bourbon" is regarded as a premium grade. India's real edge is the North Indian wild khus oil, which commands a much higher price than ordinary vetiver oil but is scarce and seldom sold outside the country. When sourcing, be explicit about whether you want true ruh khus (northern, laevorotatory) or standard cultivated South-Indian oil, because profile and price differ sharply; ask for vetiverol content and optical rotation on the certificate of analysis.

Frequently asked