American Pillar Arborvitae (Thuja occidentalis) typically reaches 50-100 ft tall, 10-20 ft wide with a upright form. It grows at a fast rate and performs well in USDA Zones 4-9. With dense, evergreen foliage and a naturally narrow habit, this selection is a top choice for hedges, privacy screens, or foundation plantings. Low-maintenance and dependable year-round.