To maximize the growth rate potential for these trees, plant them in well-drained soil and full sun. While they will still grow quite well in partial shade, planting in full sun will both stimulate growth and promote lush green foliage.'Green Giant' has a low-branching, dense columnar-pyramidal habit. Dark green sprays of small, glossy, scale-like needles retain their deep green color through the winter. This tree can grow 3 to 4 feet per year in optimal conditions and reach a mature height of 40 to 60 feet and a width of 12 to 18 feet.