On Feb 18, 2006, Farmerdill from Augusta, GA (Zone 8a) wrote:
Potato Association of America. "Selected from a cross between Richter Jubel x USDA S44537. Released in 1946 by USDA and Cornell. Ontario is a very late maturing variety with high yields of medium specific gravity tubers. It is grown primarily in Maine, Wisconsin and Michigan. Tubers are oblong with a creamy buff smooth skin. Eyes are shallow except at apical end which is sometimes sunken. Flesh color is white."
This plant has been said to grow in the following regions: