Join us for the FUN and FESTIVITIES at the Oshawa Campus of Durham College.
Conveniently located at 2000 Simcoe Street North, Oshawa L1G 0C5 with easy access from Hwys 401 or 407.
Plans for the 2026 OHA Convention are under way. We are looking forward to a chance to reconnect and spend time with our favourite people, listen to exciting speakers, see some amazing gardens, check out and participate in a wide variety of competitions, and so much more!
More information will be coming soon, so check back here and keep an eye on your email inbox to get the latest news.
Competitions
Photography competition schedule
Flower Show Schedule
Publications Competition schedule
Youth Competition
Arts Competition
Creative Writing Competition
AGM Documents
Draft minutes of 2025 AGM meetings