Seeds of Diversity is a group of seed savers from coast to coast who protect Canada's seed biodiversity by growing it themselves and sharing with others. Their webpage has a list of all of the Seedy Saturday and Seedy Sunday events across the country, as well as the Canadian Seed Catalogue Index.
The Calgary Horticultural Society is a registered charity dedicated to cultivating Calgary's gardening community. They offer workshops, a magazine, a biannual plant share, and more.
Did you know? Edmonton holds Seedy Sunday the day after Calgary's Seedy Saturday!
http://www.edmontonseedysunday.org/
Here is some seed saving information.
https://www.communityseednetwork.org/resources
https://www.seedsavers.org/learn
Here is some information about non-chemical means to handling weeds:
https://www.consumernotice.org/environmental/pesticides/roundup/alternatives/