Arborvitae are evergreen shrubs or trees useful in urban areas of Pa and NJ where low maintenance and durability is needed. These plants can also make living fences. A living fence created from Arborvitae can help with your home heating and cooling costs. Many cultivars with forms such as being globed in shape, columnar, or narrow pyramidal, tend to be near buildings, doors, and walkways. Other forms which are larger are used for screens and buffers that are planted in rows.