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botanical name:
Thuja occidentalis 'Smaragd'
Thuja occidentalis 'Smaragd' © Deeproot Plant Base
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common name:  American Arbor-vitae, White Cedar
synonyms:  Thuja occidentalis 'Emerald', Thuja occidentalis 'Emeraude'
family:  Cupressaceae
characteristics: conifer, evergreen
height: 6.00m
width: 1.50m
growth rate: medium
growth habit: columnar
leaf colour: green
flower colour:
stem/bark: brown
main season: All Year
aspect: full sun
conditions: moist soil, clay soil, sandy soil
preferred soil pH: neutral-alkaline
minimum temp: -39°C
USDA zone: 3 to 8
Very fine narrowly columnar small tree with excellent dense, bright emerald green foliage which becomes attractively tinted with deep olivey old gold in winter.

Very hardy. Moist, well drained soil in sun.
May be trimmed to formal shapes or as a hedge, but will not regrow from old wood so this needs to be done with some care.

By cuttings, preferably with a heel, taken in early spring or in autumn.

Good, strongly vertical focal plant or may be used in formal designs as a hardier alternative to the Italian Cypress.

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