ESSENTIAL OILS details

Essential oils come from different parts of plants. In some they accumulate in the petals, in others in the roots, rinds, seeds, stalks, sap, nuts, leaves or bark.
Sandalwood oil gathers at the heart of the wood of the tree, but only once the tree has reached the age of 40 years. In Jasmine it is concentrated in the petals on the night when the flowers are one day old, for best oil they need to be hand picked before dawn.
Rose is the rarest and most expensive of all. Two tons of fresh petals in full bloom yield a mere 1 kg of essential oil.
The orange tree produces three oils - Neroli from the blossoms, Petitgrain from the leaves and orange oil from the rind of the fruit, each one having its own distinct properties.
The quality of an essential oil can vary from year to year just like vintages in wine. Altitude and soil differences effect quality as much as climate and the exact moment of harvest. Picking the raw ingredients, at the right time using the best possible extraction method is vital or the oils could end up  being of inferior quality.
 It is important to buy pure essential oils from a reputable source, as inferior quality or dilute forms may have lost potency. Fortunately, with the renewed interest in aromatherapy, it is possible to buy fine oils from specialist outlets. If in doubt, your nearest Aromatherapy Association will be able to offer guidance.
Methods of extraction to follow..