American Chestnut Tree. Castenea Dentata. Approx 1 ft in Height Our American chestnut trees have proven excellent resistance to Chestnut blight. Our selected seeds comes from trees that have shown longer term resistance than most. Two trees are needed for nut production. American chestnut trees grow some to height of 20 feet tall or more. Suited for zones 4b-8. PLEASE RESERVE YOUR PURCHASE VOLUME QUANTITY NOW, FOR EARLY SPRING DELIVERY 2016