Dr. Alexander Fitzburgh, an expert in the propagation of rhododendrons and azaleas, recently led a plant propagation workshop at the new educational greenhouse at the Knippenberg Center for Education, Laurelwood Arboretum, 725 Pines Lake Road, Wayne. Dr. Fitzburgh, is past president of the NJ Rhododendron Society and the Tappan Zee Rhododendron Society and past president of Friends of Laurelwood Arboretum (FOLA). The arboretum is known for its extensive collection of rhododendrons grown and propagated by its founders, John and Dorothy Knippenberg.