Techny Cedar Thuja occidentalis 'Techny' Description Dark green foliage.Growth Habit: Upright, narrow and pyramidal Mature Height: 10' to 20' (305 cm to 610 cm)Mature Spread: 5' to 10' (152 cm to 305 cm)Growth Rate: Moderate More Details Sun Exposure: Full Sun to Partial ShadeCold Hardiness Zone: 3Landscape Uses: Hedge and windbreak