Aromatherapy is the practice of using volatile oils derived from plants. For many thousands of years, this form of science has been used for a variety of purposes, not least of which is to improve general well-being.
The Egyptians were the first people to ever use a distillation machine to extract liquid from plants. Often, they used distillation for plants whose oils are harder to extract, especially if they come from roots, twigs, and barks. These organic aromatherapy oils were then used as perfumes, bath scents, massage oils, and even ointments for healing wounds. Since there were no chemical pesticides developed at that time, it is safe to say that all their organic aromatherapy oils were truly organic in the sense that they contained no synthetic chemicals.
Today, there are many ways by which oils are extracted from plants. There is simple distillation, solvent action, or carbon dioxide pressure. Each method produced different types of organic aromatherapy oils, such as essential oils, absolutes, CO2s, carrier oils, infused oils, resins, and even hydrosols or floral waters.
Organic aromatherapy oils are distilled or extracted from plants that are grown without being exposed to pesticide. This of course means that organic aromatherapy oils do not contain chemicals absorbed by plants from pesticides, unlike plants that have been exposed to pesticides. For this reason, some people claim that organic aromatherapy oils are superior to non-organic oils.
There is no actual scientific evidence that organic aromatherapy oils are more effective than non-organic oils. It is safe to say however that with organic aromatherapy oils there is less chance of having the oils compromised by the addition of chemicals from pesticides. Some might say that pesticides do not appear in oils and thus it does not matter. But more direct observations were made and they all show that organic aromatherapy oils may be more effective when it comes to their therapeutic and health benefits.
It is also interesting to note that vendors of organic aromatherapy oils may be sourcing their oils more carefully for not only oils that are grown in compliance with organic farming principles but may also be more carefully sourcing their oils for therapeutic quality and aroma. In the end, the choice is yours. You are not compelled to limit your alternatives to organic aromatherapy oil products. And neither are you prohibited from buying non-organic oils. Just one thing: do expect to pay more for organic aromatherapy oils since it does cost a lot more to grow crops via organic means.