This collection consists of hand-written notes; notebooks; programmes; plant lists; plant records; maps; drawings; measurements; tour scripts; photographs; slides; postcards; and photographs.

This collection consists of textbooks; correspondence; articles; pamphlets; newspaper articles; bulletins; guidebooks; booklets; registration forms; maps; master plans; inventories; indexes; publications; slides; reports; conference and symposium programmes; speaker biographies; mailing lists; business cards; hand-written notes; photocopied articles and appendices; presentations; and reference lists created by Canadian conference organizers and their participants with a focus on horticulture, landscape, garden history, and historical farms and museums.

This collection consists of bulletins; newsletters; yearbooks; correspondence; articles; pamphlets; registries; annual reports; member lists; judge list; officer list; newspaper clippings; constitutions and by-laws; application forms; board of directors documents; and a flower show programme.