Cavendish Farms

Vendor's own Our Story page states Cavendish Farms is part of the J.D. Irving, Limited group of companies, a privately held Irving family business founded 1882. Wikipedia corroborates it as a private Canadian company owned by the Irving family, but that is a directory-tier source so confidence stays at reported; no Corporations Canada or provincial registry filing was checked.

• Our Story | Our Business | Our Values | Cavendish Farms · the vendor's own site “At Cavendish Farms®, we're proud of being part of a larger family, the J.D. Irving Group of Companies.”
• Cavendish Farms - Wikipedia · directory “Private Canadian company owned by KC Irving family”

Four processing sites named on the vendor's own pages: two potato plants in the New Annan, PEI area, one in Lethbridge, AB, and an appetizer plant in Wheatley, ON, versus one US plant in Jamestown, ND. Weighted by plant count (4 CA of 5) as no revenue split is published; which plants ship into Canadian retail specifically was not confirmed.

• Where We Grow the Best Potatoes | Cavendish Farms · the vendor's own site “Prince Edward Island... Lethbridge, AB... Jamestown, ND... Wheatley, ON”
• Contact Us | Cavendish Farms · the vendor's own site “Plants New Annan, P.E.I., Canada... Lethbridge, Alberta, Canada... Wheatley, Ontario, Canada... Jamestown, North Dakota, USA”

Head office in Dieppe, NB, with Canadian sales offices in Toronto, Laval, Lethbridge and Dieppe, plus plant staff at New Annan (about 700 employees per Wikipedia), Lethbridge and Wheatley. One US sales office in Burlington, MA and staff at the Jamestown, ND plant.

• Contact Us | Cavendish Farms · the vendor's own site “Head Office Canada Cavendish Farms 100 Midland Dr. Dieppe, New Brunswick”

Vendor describes growing regions in PEI, Lethbridge AB and Wheatley ON as the source of potatoes and vegetables for those plants, with about 80 PEI farmers under contract. Wikipedia notes a 2017 shortfall led the company to import potatoes from New Brunswick, Manitoba, Alberta and Maine; the Jamestown, ND plant runs on North Dakota-grown potatoes. Mix follows the Canadian-heavy manufacturing footprint with a US share for Jamestown and occasional Maine imports.

• Where We Grow the Best Potatoes | Cavendish Farms · the vendor's own site “Southwestern Ontario is one of the province's key vegetable-growing regions.”
• Cavendish Farms - Wikipedia · directory “the company imported 150 million pounds of potatoes in 2017 from New Brunswick, Manitoba, Alberta and Maine”