Deepen your knowledge of herbs that strengthen our respiratory system such as elecampane, andrographis, and astragalus. Learn about clinical studies involving echinacea’s ability to shorten the duration of colds. Herbal tea included in price of admission. This class is part of the herbal lecture series at the Heart of Northside, located at 4222 Hamilton Ave. Park in the lot behind the building and look for signs on where to enter the building.