Technical specifications of Paulownia seedlings Age of economic harvest 5 to 8 years Number of trees per hectare 625 thousand to forty thousand seedlings Planting distance 4 * 4 or 2 * 5 or 3 * 3 or 1 * 1 or half in half Income product Wood, twigs, leaves and honey The amount of wood in the fifth year Half a cubic meter The amount of wood in the eighth year One cubic meter Dehydration rate Each tree is five to twenty liters per week