White Cedar, Eastern Arborvitae, American Arborvitae 'DeGroots Spire'

Thuja occidentalis

Family: Cupressaceae (koo-press-AY-see-ee) (Info)
Genus: Thuja (THOO-yuh) (Info)
Species: occidentalis (ok-sih-den-TAY-liss) (Info)
Cultivar: DeGroots Spire




Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun


Grown for foliage


Provides Winter Interest

Foliage Color:

Unknown - Tell us


6-8 ft. (1.8-2.4 m)

8-10 ft. (2.4-3 m)


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


USDA Zone 2a: to -45.5 C (-50 F)

USDA Zone 2b: to -42.7 C (-45 F)

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Where to Grow:

Grow outdoors year-round in hardiness zone

Can be grown as an annual



Bloom Color:



Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Winter/Early Spring

Other details:

Unknown - Tell us

Soil pH requirements:

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

From seed; sow indoors before last frost

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant is said to grow outdoors in the following regions:

Chelsea, Alabama

Ashkum, Illinois

Champaign, Illinois

Park Ridge, Illinois

Louisville, Kentucky

Taylorsville, Kentucky

Roslindale, Massachusetts

North Lewisburg, Ohio

Amelia Court House, Virginia

show all

Gardeners' Notes:


On Feb 21, 2021, containers_only from Vancouver,
Canada wrote:

I have 3 of these in 3 containers in a sheltered corner on a deck that gets sun from around 8/9 until 2/3. They're going into their 4th summer. I'm sure if I repotted larger they would grow at least another foot by fall.

They grow naturally in an almost spiral design which I trim minimally just to enhance the natural curve. They are a stunning group. I can see them all the time from inside my 3rd floor apartment. Don't hesitate to get add some to your deck.

This is Zone 6B(?) Pacific NW Coast, Vancouver Canada.


On Mar 12, 2014, coriaceous from ROSLINDALE, MA wrote:

This is the narrowest columnar evergreen I know. It's the only one I know that's hardy in Boston (Z6a) and narrow enough to pass for an Italian cypress (Cupressus sempervirens) at first glance.

This is slower growing than most other arborvitae. Its foliage has a different texture, and it seems to shed snow and ice better. I'd still tie up multitrunked specimens for the winter.

Under good conditions, it can still grow a foot per year, and it doesn't suddenly stop growing when it gets tall. It can easily get 25' tall and 4' wide.

I'm skeptical of the above claim that this cultivar is hardy north of Z3, or that it's any more tolerant of hot humid summers south of Z7 in the southeastern US.

This cultivar will not come true from seed,... read more


On Nov 25, 2013, sladeofsky from Louisville, KY (Zone 6b) wrote:

The slow compact growth of 'Degroot's Spire' means that the plants are much more stout and less likely to bend than most thujas, which are generally lax and prone to heading over in wind and wet.


On Apr 1, 2007, greenobsessed from Champaign, IL (Zone 5a) wrote:

mine are on thier 2nd year in full sun and lots of wind and totally beautiful. no wind burn or die back.slow growing and inch or 2 per year