Emerald Green Arborvitae (scientific name: Thuja occidentalis 'Smaragd').A classic, narrow evergreen favored for its compact growth habit and shimmering emerald-green foliage that resists bronzing in the winter. Its dense, pyramidal shape makes it an ideal choice for tight spaces, formal garden accents, or creating a neat, low-maintenance privacy hedge.For a solid privacy screen, we recommend spacing these 2 to 3 feet apart on center. This allows the trees to fill in quickly while still giving the root systems enough room to establish.