thuja smaragd - Knowledgebase Question

milford, Pa
Question by jkreilly
August 20, 2007
My local home depot is selling potted arbovitae marked thuja smaragd and thuja green giant on the same plant. Is thuja smaragd a true thuja giant, i.e. a plicata-standishii graft? Thank you.

Answer from NGA
August 20, 2007


Thuja "Smaragd" (a synonym for "Emerald") is a Thuja occidentalis cultivar originally from Denmark. It should hold a good green color in winter and reach 10 to 15 feet tall and 3 to 4 feet wide.

Thuja "Green Giant" was introduced by the US National Arboretum about ten years ago. It is a larger plant and grows about twice as wide. Here is information and photos of it.

Unfortunately, I am not sure which plant this one would be if it has two different labels on it. I'm sorry I can't be more helpful.

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