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.

Photographs are divided into seven subseries:
A - Architecture
B - Arts (Theatre, music, dance, arts, crafts)
C - Business & industry
D - Churches
E - Communities in Northwestern Ontario
F - People, families, & genealogy
G - Organizations