According to NCSU:
Thuja occidentalis 'Holmstrup'
Common Name(s):
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Holmstrup Arborvitae is an evergreen conifer in the cypress family native to North America. It is slow-growing and will take 10 years to reach 10 feet tall and 2.5 feet wide. The foliage is attractive with scale-like leaves in dense horizontal sprays that hold their color well through winter. The form is a narrow pyramidal shape.
It is adaptable to various soil types but prefers moist well-drained loams. It is not drought tolerant. Use this tree in foundation plantings, as a hedge, or as a focal point in small gardens. This conifer is browsed by deer.