- The hickory tree nut is generally considered to exhibit embryo dormancy and needs stratification. The common treatment is to stratify the nuts in a moist medium at 33 to 50 degrees F for 30 to 150 days. If cold storage facilities are not available, stratification in a pit with a covering of about 0.5 m of compost, leaves, or soil to prevent freezing will suffice. Prior to any cold stratification, nuts should be soaked in water at room temperature for 2 to 4 days with 1 or 2 water changes each day.
