The towering and sharply vertical form of the Emerald Green Arborvitae has launched this cultivar to become 1 of the most popular shrubs for screening and tall hedges. Reaching heights up to 15 ft. with a spread of only 3 4, Emerald Green are natural pillars that are excellent for privacy screens and tall accent points. Lacy, intricate olive-green foliage adorns these colorful columns that both looks and feels soft. Emerald Green Arborvitae are incredibly easy to grow and are best left unpruned in order for them to attain their stately columnar form. Emerald Green Arborvitae, botanical name Thuja occidentalis Smaragd, is suited to USDA hardiness zones 4 to 9, with full sun. It grows to a towering height of 15 ft., with a slim spread of only 3 ft. to 4 ft. The Emerald Green Arborvitae is a dynamic evergreen addition to any garden or landscape, both large and small, that's impossible to miss with its tall, slender form and rich, intricate, colorful foliage.