WSU Clark County Extension
PNW Plants Searchable, categorized images
              

Emerald Green Arborvitae

Scientific name: Thuja occidentalis 'Smaragd'
Taxonomy
Family:Cupressaceae
Type:Coniferous trees
Native:NO
Plant Requirements
Zone:4 to 8
Sun:Full to partial sun
Moisture:Dry
Plant Characteristics
Height:15 ft
Width:5 ft
Additional Characteristics
Trees


Fruit

Leaves


Bark
Wildlife value

Poisonous
Description One of the popular screening hedge plants on the West Coast, Emerald Green Arborvitae is prized for retaining its deep green foliage all year long. Also known as Smaragd Arborvitae

  Morphology:
This evergreen tree grows to mature height of 15’ with a width of 4’-5’. Each year it puts on 6”-9" of new growth once established. The foliage is soft, bright green and arranged in somewhat vertical fanlike sprays. Upon close examination the small, scale-like leaves overlap forming flattened, rope-like shoots.

This plant can be sheared to maintain it’s shape and size. However, all too often home-owners will top this plant. If cut back into older wood new foliage will not grow.

  Adaptation:
Full sun or partial sun; doesn't like shade. Likes well-drained soil, but must be kept well watered when first planted.

  Pests:
Spider mites can cause yellowing and speckling of the foliage. The mites are seldom noticed because they are so small. Spider mites are only a problem in hot, dry and dusty sites.
For assistance, contact Dr. Charles Brun (brunc@wsu.edu), (360) 397-6060 5701
Computing and Web Resources, PO Box 6234, Washington State University, Pullman WA 99164-6234