What are some natural scent relaxers (aroma therapy homemade)?

Aroma therapy: Is a form of alternative medicine that uses volatile plant materials known as essential oils for purpose of altering mood or cognition or general health. Evidence for effectiveness is still controvertial. One example is tea tree.

Aromatherapy: Aromatherapy is a technique in which essential oils from plants are used with the intention of preventing or treating illness, reducing stress, or enhancing well-being. There are many scented products like potpourri, etc, but aroma therapy uses stronger concentrates directly from the plants. Common ones include lavender for sleep & relaxation, and lemon balm to reduce agitation in dementia.