Techny' Cold Hardy Thuja Tree

Techny arborvitae is a dense, pyramidal evergreen cultivar of Thuja occidentalis. It typically reaches about 12–15 feet tall and is often planted as a large hedge or screen. Its dark green foliage remains through winter. The plant grows in full sun to part shade and is hardy in USDA zones 3–8. It prefers moist, well-drained loam. [Chicago Botanic Garden plant finder](https://www.chicagobotanic.org/plant-information/plant-finder/thuja-occidentalis-techny-techny-arborvitae); [Dawes Arboretum profile](https://dawesarb.arboretumexplorer.org/taxon-19068.aspx). ## Garden Use Its dense outline works in a hedge or screen, and it can also be planted as a specimen. Allow room for the mature spread when setting plants in a row. ## Maintenance Keep the root zone from drying out, especially during establishment. Good drainage is important; avoid persistently waterlogged soil. Prune only as needed to maintain the intended shape or screen.