Columnar Arborvitae Columnaris is a narrow, upright evergreen conifer, recognized for its dense, dark green foliage and columnar shape, making it perfect for creating vertical interest in the garden. This tree typically grows to about 4-6 m in height, making it ideal for use as a screen, hedge, or feature plant. Columnar Arborvitae Columnaris thrives in full sun to partial shade and prefers well-drained soil. Its tall, slender form and dense foliage make it a popular choice for formal gardens and privacy screens.