Stay Updated with the Latest OHA News
OHA Guidelines for Virtual Shows & Photography Judging Video:
The Autumn edition of Trillium is here!
From our editor Laura Masterson: This issue is packed from the first...
Visit the Garden Shop!
FYI, the OHA has Metal pollinator signs in French or English, for your...
Powdery Mildew
Some helpful information to combat powdery mildew from our GardenOntario...
Ontario’s Most Unwanted Invasive Plant Species
The Ontario Invasive Plant Council provides knowledgeable fact sheets on...
The Convention is here!
Are you excited? We sure are to host our first ever Virtual Ontario...
The Trillium News
Enjoy past editions of our newsletter.
Search the Trillium newsletter archives and click to download. For a specific edition of the Trillium not listed, please contact the Editor
2021 Archive of The Trillium Newsletter
2019 Archive of The Trillium Newsletter
2017 Archive of The Trillium Newsletter
2015 Archive of The Trillium Newsletter
2013 Archive of The Trillium Newsletter
2011 Archive of The Trillium Newsletter
2009 Archive of The Trillium Newsletter
2007 Archive of The Trillium Newsletter
2020 Archive of The Trillium Newsletter
2018 Archive of The Trillium Newsletter
2016 Archive of The Trillium Newsletter
2014 Archive of The Trillium Newsletter
2012 Archive of The Trillium Newsletter
2010 Archive of The Trillium Newsletter
2008 Archive of The Trillium Newsletter
2006 Archive of The Trillium Newsletter
Trillium Deadline Dates and Submissions
The Trillium is published 4 times per year:
March 1 – Spring issue
June 1 – Summer Issue
September 1 – Autumn Issue
December 1 – Winter Issue
Articles for the Trillium should be sent in the following formats: for Windows – Word or plain text; and for Mac/OSX – please use Pages. Photos and other graphics should be sent as separate files (min res 1,000 x 800 pixels) and not as part of a Word file. Full-sized original files are happily accepted.
Email your articles to editor@gardenontario.org or
by mail/courier to:
The OHA Trillium Editor,
c/o Laura Masterson
2986 Wessel Drive, R.R. #1,
St. Catharines, ON
L2R 6P7
Reports & Statements
We provide annual reports that you can review. These reports showcase the work of the OHA and the many projects we support across Ontario.
