Gardens are grouped by province and then by city with in the province.
Alberta – Province
Calgary
https://www.calgary.ca/CSPS/Parks/Pages/Locations/Downtown-parks/Devonian-Gardens.aspx
Devon
https://botanicgarden.ualberta.ca/
Edmonton
https://www.edmonton.ca/attractions_events/muttart-conservatory.aspx
Lethbridge
Olds
https://www.oldscollege.ca/about/campus/botanic-gardens/index.html
British Columbia – Province
Tofino
Vancouver – Province
https://vancouver.ca/parks-recreation-culture/bloedel-conservatory.aspx
https://vancouver.ca/parks-recreation-culture/queen-elizabeth-park.aspx
https://botanicalgarden.ubc.ca/
https://botanicalgarden.ubc.ca/research-collections/plant-collections/
Victoria
https://www.butchartgardens.com/
http://hatleypark.ca/hatley-park-gardens
Manitoba – Province
Winnipeg
New Brunswick – Province
St. Johns
Nova Scotia
Annapolis Royal
Halifax
http://www.halifaxpublicgardens.ca/
Wolfville
https://botanicalgardens.acadiau.ca/welcome.html
Ontario – Province
https://rainbowgardenclubcom.wordpress.com/public-gardens-in-ontario/
Québec – Province
Grand-Metis
Montréal
http://espacepourlavie.ca/en/botanical-garden
https://www.lemontroyal.qc.ca/en
Québec City
https://www.mcgill.ca/morganarboretum/
Saskatchewan – Province
Saskatoon
https://patterson-arboretum.usask.ca/
Regina
https://reginafloralconservatory.ca/