Thuja occidentalis 'Smaragd' Emerald Cedar Description Emerald green feathery foliage. Growth Habit: Upright, narrow, conical to pyramidal Mature Height: 13' to 16' (3.9m to 4.8m)Mature Spread: 3.5' to 4' (105 cm to 120 cm)Growth Rate: Moderate More Details Sun Exposure: Full Sun to Partial ShadeCold Hardiness Zone: 4Landscape Uses: Hedge and topiary