10 Essential Oils for Beginners and their uses. Including Lavender, Peppermint, Lemon, Tea Tree, & More! Shop our extensive line of Plant Therapy Essential Oils. You can learn more about essential oils on Plant Therapy's Blog. Essential Oils have been around for centuries and can be used as remedies for many different things. These remedies allow the user to have a more holistic approach on their life and health.