This is a tough one... I know only a little of the history of OTL New Sweden along the Delaware River. It was kind of an amalgam of Swedes, Finns, & Dutch. One of the attractions for the Swedes was tabacco farming, which I think is difficult in maritime Canada. Maybe in Southern Ontario?
The Forest Finns may be the ticket for a Swedish colony in Canada. Their farm clearing methods were consistent with common Eastern Native American practice - slash and burn.
Where would they settle, though?