Northern White Cedar Seeds Can Grow in Swamps and Lowlands Canada25+ Seeds This medium-sized tree grows to a height of 25 to 50 feet, and a diameter of 1 to 2 feet. The small, oblong cones stand erect on flattened branchlets that are covered by overlapping, scalelike leaves. The thin bark sheds in long, narrow strips. Planting instructions included with purchase Height 25 - 50 feet, Full - partial sun 25 seeds in package