Just in case you haven't heard the news, here's the sordid story on the SafeLawns blog.
Short version? Members of Landscape Ontario, the province’s trade association representing the lawn industry, were pretty unhappy when they heard that A Chemical Reaction – the stirring documentary about the first town in Canada to ban lawn pesticides – was scheduled to be shown at the "Canada Blooms" show next March. They lobbied, proposed that the screening be cancelled, and won in a vote of the Board of Directors.
Landscape Ontario's response to the resulting outcry? In part,
We do not feel we should be politicizing or polarizing people at a garden show. Canada Blooms is meant to be a celebration of horticulture and floriculture. We are not against showing the film nor are we against free speach (sic) and debate. In fact we encourage it. We just do not feel that Canada Blooms is the correct venue for doing this.
If you'd like to weigh in, click the SafeLawns link above to see the full list of Canada Blooms directors – the people to complain to.