Sara WilliamsSara Williams has retired as the horticultural specialist at the University of Saskatchewan. She is the co-author of Perennials for the Plains and Prairies and author of the award-winning Creating the Prairie Xeriscape and In a Cold Land: Saskatchewa's Horticultural Pioneers. She holds a B.Sc. and M.Sc. in horticulture from the University of Saskatchewan. Read More Read Less