Scientific Name:
Thuja occidentalis
'Smaragd'
Pronunciation:
THOO-yuh ok-sih-den-TAY-liss
Common Name:
emerald cedar, eastern white cedar
Family Name:
Cupressaceae
Plant Type:
Conifer
Key ID Features:
Compact, columnar, fine-textured evergreen commonly used as a hedge; leaves scale-like, glossy dark green, very fine texture, thread-like, on fan-shaped branchlets that may be vertically oriented (compared fo pyramidal cedar which has more horizontally oriented branchlets with thicker, lighter dull-green scale leaves).
Habit:
Fastigiate, Stiffly upright
Form:
Columnar
Texture:
Fine
Mature Height:
3 - 5m
Mature Spread:
1.0 - 1.5m
Growth Rate:
Slow
Origin:
Canada - eastern, Garden origin, U.S. - northeast
Hardiness Rating:
Zone 3: (-40 to -34 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Humus rich, Well-drained
Water Use:
Moderate
Landscape Uses:
Accent plant, Hedge row, Screening, Sheared hedge
Additional Info:
Leaf Morphology:
Form:
Scale-like
Arrangement:
Opposite, Imbricate
Texture/Venation:
Leathery
Surfaces:
Glabrous
Colour in Summer:
Green, Dark-green, green-yellow new growth in May
Colour in Fall:
Green
Shapes:
Rhomboidal
Apices:
Acute
Bases:
Sheathing
Margins:
Entire
Inflorescence Type:
n/a (male cone)
Flower Morphology:
Monoecious plant
Colour (petals):
Male cone, No flowers, Yellow, Brown
Flower Time at Peak:
Apr, May
Fruit Type:
Cone (winged seeds)
Fruit Colour:
Brown
Fruiting Time:
Aug, Sep
Bark Morphology:
Plated, Other
Bark or Stem Colour:
Brown
Propagation:
Softwood cuttings
Maintenance:
Low
Other:
Prune in in fall or early spring before onset of new growth or if grown as a hedge, trim in spring and late summer as desired (train to cone shape with a single leader to avoid ice and snow damage). Water well in hot and dry weather or mulch the root zone
Pest Susceptibility:
Scale insects (Pest resistant, Disease resistant)
Course(s):
- HORT 1155
- Level 2 Apprenticeship
Location(s):
- (GAZ) GAZebo
- (GAZE) GAZebo East : q.1
- (GAZN) GAZebo North : hedge
- (GAZW) GAZebo West : hedge
- (NRY) NuRserY