Plant Finder Tool


Threadleaf Arborvitae

Thuja occidentalis 'Filiformis (tree form)'

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Threadleaf Arborvitae (Thuja occidentalis 'Filiformis (tree form)') at Rainbow Gardens

Threadleaf Arborvitae

Threadleaf Arborvitae

(Photo courtesy of NetPS Plant Finder)

Height:  8 feet

Spread:  4 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  3b

Other Names:  Eastern White Cedar


A very interesting evergreen which features arching sprays of fine, thread-like bright green foliage on a weeping tree form; unquestionably distinctive, use as a solitary accent in the garden; needs shelter from drying winds

Ornamental Features

Threadleaf Arborvitae is primarily valued in the landscape or garden for its highly ornamental weeping form. It has attractive green evergreen foliage which emerges light green in spring. The threadlike sprays of foliage are highly ornamental and remain green throughout the winter.

Landscape Attributes

Threadleaf Arborvitae is an evergreen tree with a strong central leader and a rounded form and gracefully weeping branches. It lends an extremely fine and delicate texture to the landscape composition which can make it a great accent feature on this basis alone.

This is a relatively low maintenance tree. When pruning is necessary, it is recommended to only trim back the new growth of the current season, other than to remove any dieback. It has no significant negative characteristics.

Threadleaf Arborvitae is recommended for the following landscape applications;

  • Accent
  • General Garden Use

Planting & Growing

Threadleaf Arborvitae will grow to be about 8 feet tall at maturity, with a spread of 4 feet. It tends to be a little leggy, with a typical clearance of 4 feet from the ground, and is suitable for planting under power lines. It grows at a slow rate, and under ideal conditions can be expected to live for 50 years or more.

This tree does best in full sun to partial shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It may require supplemental watering during periods of drought or extended heat. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selection of a native North American species.

Hardiness Zone Plant Height Minimum Sunlight
Accent  Garden 
Foliage Color  Texture  Plant Form  Winter Value 
Ornamental Features

Disclaimer - This Plant Finder tool is an online resource representing many of the varieties that we carry over the course of the season, and is intended for informational purposes only. Inventory varies seasonally, so we cannot guarantee that every plant will be in stock at all times - please contact the store directly for current availability. It does not include our entire selection of plants, so be sure to visit our store to see varieties that may not be represented on this list.