WSU Clark County Extension
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Silver Queen Lawson Cypress

Scientific name: Chamaecyparis lawsoniana 'Silver Queen'
Taxonomy
Family:Cupressaceae
Type:Coniferous trees
Native:NO
Plant Requirements
Zone:5 to 8
Sun:Full to partial sun
Moisture:Medium
Plant Characteristics
Height:30 ft
Width:13 ft
Additional Characteristics
Trees


Fruit

Leaves


Bark
Wildlife value

Poisonous
Description This Lawson Cypress cultivar is prized in the landscape trade for its mid-green sprays mottled with white variegation.

  Morphology:
Silver Queen Lawson cypress is a horticultural variant of Port Orford Cedar, which is a native of the Siskyou Mountains of northern California. This cultivar makes a slow to medium growing conifer that reaches an eventual height of 30’ with a width of 13’. Its most notable feature is the occurrence of new growth which is white to yellow/green.

It has spreading, pendulous branches leading to sprayed foliage that is somewhat scaly. The buds and cones are small.

  Adaptation:
This plant enjoys low humidity and cooler weather, as would be found in the areas west of the Cascade Mountains. This is a common cultivar in England as well.

  Pests:
While there are problems with root rot (Phytophthora spp.) on native species of Port Orford cedar, the literature does not report this to be a problem on this cultivar.
For assistance, contact Dr. Charles Brun (brunc@wsu.edu), (360) 397-6060 5701
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