- Make the commitment here! Join us one weekend day or one weekday per month starting in April 2018! Teachers include Linda Shanahan, RN, owner of Barefoot Botanicals & Sharon Moncrief, Owner of Greenbrier Herbalist. Guest teachers with expertise in botany, mushroom ecology and other amazing topics to be announced. Classes take place at our farm in Doylestown, PA from 10-5 each day. Easily accessible by rail on the Septa R5 train line.