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<--------- click this picture for 14  more pictures of the Green Giant Hedge at the National Arboretum in Washington DC.
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The original Green Giant  planted in the United States at  the US National Arboretum, now 45-50 feet tall and 10 feet wide at the base.

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Planted about 2 feet from the greenhouse grows 2 feet over the curb. Notice vertical side by the curb and how it holds its foliage to the ground.

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This is the tree planted 2 feet from the greenhouse. It has not damaged the greenhouse, the walk or the asphalt.

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Poster in U.S. National Arboretum promoting Green Giant as bagworm and deer resistant.

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Pictures 6 through 16 were taken at Spring Grove Cemetery and Arboretum in Cincinnati, Ohio. Chartered in 1845  with 400 active acres , and a population of 200,000 graves it is one of the largest in the U.S. Its founders were committed to maintaining the landscape--a radical idea in the 1800's--which resulted in one of the most magnificent examples of landscape architecture in the country. These Thuja Plicatas (Western Red Cedar) I understand were planted in the 1800's. Green Giant differs in that it is a hybrid and grows much faster


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Pictures 11, 12 and 13 are the same tree but look at how they have been trimmed, with graves and a stone bench underneath. Also note the Ivy Hedra Helix growing under them. These trees are about 5 feet apart. I am amazed that I didn't see any gravestones, paths or roads uplifted by the roots. Notice also that almost all Thuja Plicatas have a central leader.

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Parking lot at Longwood gardens in Pennsylvania. Atrovirins is a selected variety of Thuja Plicata.

 


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Atrovirins in front of Conservatory. They grow slower and could be less drought tolerant than other cultivars.

 


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Zibrina, a variegated variety of Thuja Plicata:  Shady side has lost yellow variegation but sunny side looks good. Zabrina in my area have marginal yellow color--SW Missouri.

 

 


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Another variety of Thuja plicata. Has not done well in South-west Missouri

 


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Hogan in the early morning haze at the University of Georgia, Athens. Garden developed by Dr. M. Dirr.
Height 30 to 35 feet. This is also a variety of Thuja Plicata. I Think this variety was promoted before the superior Green Giant was recognized.

 


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Green Giant hedge. J.C. Raulston Arboretum, NC State Arboretum in Raleigh. Early work by Dr. Raulston and Dr. Tripp showed how well many Thuja Plicata's could grow in the heat and clay soils in the south.

 


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10 to 12 inch Green Giant planted in June 1997, now approximately 8 feet tall and 4 feet wide. Picture taken June 4 2000. This tree is planted in a location that gets a lot of shade.


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Center plants are Thuja Plicata, variety is Euchlora. Other plants are Thuja Occidentalis (American Arborvitae).
 Notice the protective fencing and the trees eaten by deer.

 


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Deer damage of American Arborvitae, variety Lutea

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Mr Tubesing showing deer damage to Thuja Occidentalis (American Arborvitae) , also notice Thuja O. have multiple trunks or tops. Multiple trunks or tops generally increase snow and ice damage. Thuja Plicata and Green Giant form central leaders.

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Green Giant Thuja about 9 feet tall, planted in 1996. Deer pass this young tree
and eat the others.

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Thuja Standishi--Japanese Arborvitae. Notice how the deer have eaten this plant. This is 1/2 the parentage of Green Giant.    Thuja Standishi x Thuja Plicata = Thuja Green Giant

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Thuja Plicata and Green Giant are easily maintained as a formal or natural hedge. They can be almost completely defoliated and come back. The Holden Arboretum has an outstanding hedge collection.

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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.


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Updated February 2 2012

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