This is the original Thuja hybrid Standishi x Plicata D.T. Pouisens tree from Denmark. Planted in 1967 at our U S National Arboretum in Washington, D. C. Collection #29972. Prior to going to Denmark, the mother of this Green Giant was and is a native American tree growing from northern California into southern Alaska. It also grows in Montana and Idaho. The record height is 180 feet and they can live for 2000 yrs. Almost all cedar shake shingles in the US are made from Thuja Plicata. Look at the lower left side of the tree on the left. This is a new Green Giant that has rooted from a branch from the mother tree. The next picture is a new plant. I pulled a rooted limb from the ground and removed it from the tree limb. This is an easy way to propagate this plant.