Echinacea tea can be made using a variety of plant parts from the echinacea plant including the roots, leaves, flowers, and stems. However, the purple flowers and roots are most commonly used to brew teas. According to a study, all parts of Echinacea are medicinal, so leaves, flowers, or roots can be used in remedies such as tea. Therefore, it is possible to use any part of the plant to make tea, but the flowers and roots are the most commonly used parts.