Wintergreen Cedar Thuja occidentalis 'Wintergreen' Description Dark green foliage. Growth Habit: Narrow, compact, columnar to pyramidal Mature Height: 15' to 20' (4.5m to 6m)Mature Spread: 4' to 5' (120 cm to 150 cm)Growth Rate: Moderate More Details Sun Exposure: Full Sun to Partial ShadeCold Hardiness Zone: 3Landscape Uses: Hedge and windbreak