Ottawa Horticultural Society Upcoming EventsNo events found for this group Past Events Better Garden Photography on Any Budget Tuesday, March 26 Vines and Trailers Tuesday, April 23 Lost Lanark Legacy Fruit Trees Tuesday, May 28 Ottawa Horticultural Society Auction and Plant Sale Tuesday, June 11 Spring Bulbs and Then Some ... Tuesday, September 24 International Garden Festival: Jardins des Metis Tuesday, October 22