Thuja occidentalis 'Nigra' Black Cedar Description Dark green feathery foliage. Growth Habit: Upright, conical to pyramidal Mature Height: 16' to 25' (4.8m to 7.5m)Mature Spread: 5' to 8' (150 cm to 240 cm)Growth Rate: Moderate More Details Sun Exposure: Full Sun to Partial ShadeCold Hardiness Zone: 3Landscape Use: Hedge and windbreak