Tom Thumb Arborvitae

Tom Thumb is a slow-growing, rounded form of eastern arborvitae with dense green evergreen foliage. Its compact outline gives small gardens a year-round conifer accent without the scale of a hedge-sized arborvitae. ## Garden Use and Form Allow approximately 2–3 feet in height and spread, and place it where its naturally rounded outline can be seen. It works as a foreground accent, path marker, or container evergreen. Allow room for its rounded crown as it slowly approaches its mature size. ## Growing Conditions Choose full sun or partial sun; some afternoon shade is acceptable. A moderately moist, well-drained site supports steady growth. The Tree Center lists USDA Zones 4–9 and a slow growth rate, while Missouri Botanical Garden describes the foliage as flattened and green. ## Maintenance This dwarf selection generally keeps its rounded shape without routine shearing. If trimming is needed, make light cuts while preserving the outer green foliage rather than cutting into bare inner wood. [The Tree Center plant profile](https://www.thetreecenter.com/tom-thumb-arborvitae/) and [Missouri Botanical Garden rock-garden guide](https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/gardening-help-faqs/question/314/how-to-i-create-a-rock-garden).