The Hazelnut tree is a deciduous that is closely related to trees such as birches and alders. Hazelnut trees bloom and pollinate in winter. They can be very winter hardy. When planting, it is recommended to soak roots in water for up to an hour prior to planting to increase survival. Taking about 3 years to begin harvesting nuts, a mature tree can produce up to 10 to 15 pounds of cleaned seed. They can last in commercial production for up to 40 years.