The Ontario Horticultural Association, GardenOntario, maintains a Province wide events Calendar for gardening activities.  This can be sorted by Date, District and Society. 

Nearby Societies can be found on the District 10 site – Stratford is in District 10 – which covers events in Oxford, Middlesex, Elgin, Perth and Huron Counties.

District 19  offers events in Kitchener-Waterloo and Cambridge.

Direct link to OHA main page

Direct link to Events

Direct link to Garden Shop