Marjoram Essential Oil and Sleep

"The sedative properties of Marjoram must not be abused, for it can dull the senses and cause drowsiness, and in large amounts is stupefying.... As you might expect from this, Marjoram is a very good remedy for insomnia, especially when used, together with lavender, in a warm bath before bedtime."

Davis, P. Aromatherapy an A-Z. (2000)

Insomnia and Orange Essential Oil

"Orange is a good oil to combat insomnia, and can be alternated with Lavender or Neroli or blended with either of them if there is a need for long-term treatment, since it is always wise to vary the oils used over a period of time."
Davis, P. Aromatherapy an A-Z (2000), p. 225