The chestnut cultivar Colossal originates from the USA - California Central Valley.
Reportedly, heavily loaded spreading branches can break under high burr load or in strong wind [3] For almost all American commercial chestnut growers the Colossal chestnut tree is the producer of the largest nuts and the most nuts.
Results from wind-pollination and hand-pollination experiments in Michigan strongly suggest that the highest Colossal nut production is achieved when pollen is available at anthesis.
[4] Grafted trees may start producing at a young age within the first few years of transplanting.
In the California central valley, under ideal conditions, Colossal orchards can produce 4,500 lb (2,000 kg) of nuts per acre.