Emerald Green Arborvitae is a slow growing tree so make sure to order a large tree for maximum effect in less time. Emerald Green Arborvitae grow very dense and can be used to create a sound or privacy barrier. The Emerald Green Arborvitae Shrub above was photographed on the campus of the University of Georgia after a late spring snow on March 2nd, 2009. Emerald Green Arborvitae Shrub will give color to your landscape in the Winter when many other plants are leafless and dormant.