Here's a reference that I hope helps...
https://help.cbp.gov/app/answers/det...r-personal-use
There's lots of information, and some of it is a little "indeterminate". This section of the reference link applies to Candian "imports":
Fruits and vegetables grown in Canada are generally admissible, if they have labels identifying them as products of Canada. Fruits and vegetables merely purchased in Canada are not necessarily admissible, i.e. citrus or tropical fruits such as mangos, which clearly were not grown in Canada because it does not have a climate that supports those crops. (Potatoes from western regions of Canada are currently restricted because of a disease outbreak.
While commercial imports are permitted under stringent guidelines, travelers from Canada should avoid bringing raw potatoes with them into the U.S.).
Food products from Canada, including pet food and fresh (frozen or chilled), cooked, canned or otherwise processed products containing beef, veal, bison, and cervid (e.g. deer, elk, moose, caribou etc.) are now permitted from Canada in passenger baggage. Products containing sheep, lamb, or goat will not be allowed entry. Food products should be commercially packaged and sealed with ingredients listed in English.
The passenger must provide proof of the origin of beef, pork, poultry, cervid meat, and pet food in order to bring them into the United States. Examples of proof of origin include the grocery store receipt where the product was purchased or the label on the product indicating the province in which it was packaged.