This is a great resource for sourcing seeds in Canada!

https://youngagrarians.org/local-seed-producers/

We have purchased seeds from many different companies…  We track our seed inventory and where we get them from to see what works well over time.  We also track what we plant where using this garden planner: https://gardenplanner.motherearthnews.com/  That way we can track our perennials and the year over year annuals.