Rebecca McMackin, M.Sc.   A highly respected ecologically focused horticulturist, Rebecca is also an entertaining and knowledgeable speaker.  She has worked in the Horticultural world in many capacities, including head gardener, Washington Square Park. Rebecca holds a degrees in Biology (M.Sc. University of Victoria), and Landscape Design  (M.Sc. Columbia University). Tehreem Chughtai, Calgary AB.   Tehreem…