American Chestnut tree (pure - not hybridiized). Winter hardy to -30 F. You need at least 2 trees to produce nuts. Seedling will start producing chestnuts in as soon as 5 years to more than 10 years.
American chestnut trees can grow to 80 feet tall and 40 feet wide. Can live for hundreds of years. Requires full sunlight to produce nuts. (Availability - Dec 2017)