The Boston School of Herbal Studies, in Arlington, is offering a new Aromatherapy Certification Course this fall. The course meets one Saturday a month, from September 29 through December 1, and covers how essential oils can relieve common ailments, reduce stress, enhance mood and improve memory.

Instructor Linda Patterson will also introduce different methods of blending and give demonstrations on how to use essential oils in everyday life.

Other fall offerings at the school include a Thursday evening series on such topics as soap-making, Lyme disease, mushroom medicine and herbal approaches to stress and sleeplessness.

“Our students report that the classes offer them new possibilities to improve their well-being,” says Director Madelon Hope. “We were pioneers in bringing herbal education to the Boston area and this is our 12th year of presenting classes, medicinal plant walks, apprenticeship programs and advanced training.” The classes, which meet in Arlington and Lincoln, use herbal gardens and nearby conservation land to teach about the healing energies of plants. Hope says that many local plants have beneficial effects on the environment as well as on human bodies.

Cost: $450 for course; other event costs vary. Location: The Boston School of Herbal Studies, 12 Pelham Terr., Arlington. For more information, call 781-646-6319 or visit BostonHerbalStudies.com.