|Croton, not crouton|
Some decor such as pilgrim statuettes are more of an American tradition dating back to the arrival of the ship, the Mayflower. On the other hand, many Americans who eventually moved to Canada brought their traditions with them. We have gladly adopted some and melded them with ours.
I'm not certain at what point the cornucopia, or horn of plenty, was added to the Thanksgiving decor mix, but it represents abundance and has become a meaningful part of our celebrations as well.