Plant Detail

Thuja occidentalis |Smaragd| (American Arborvitae)

Smaragd Arborvitae, Thuja occidentalis EMERALD, Thuja occidentalis 'Emerald Green', Thuja occidentalis 'Emeraude', White Cedar 'Smaragd', Northern White Cedar 'Smaragd', Swamp Cedar 'Smaragd'

Prized for its emerald green color, award-winning Thuja occidentalis 'Smaragd' or 'Emerald Green' (American Arborvitae) is a semi-dwarf, evergreen shrub of compact, narrow, upright habit with erect sprays of glossy, bright green foliage. Slow-growing, about 12 in. per year (30 cm), it maintains its lovely color year-round and does not turn bronze in winter. Forming a majestic exclamation point in the landscape, it is reliable and cold weather resistant and represents a valuable, hardy alternative to cypress. A highly popular plant for use in hedgerows and borders.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society.
  • Slow growing, this American arborvitae can reach 12-14 ft. tall (360-420 cm) and 3-4 ft. wide (90-120 cm) in 15-20 years.
  • A full sun lover, this plant is easily grown in average, moist, well-drained soils. Usually appreciates some light afternoon shade in hot summer climates. Bear in mind that foliage density loosens up in too much shade. Tolerates a wide range of soils. Thrives in humid weather with regular rain falls. Intolerant of dry conditions. Protect from drying winds especially when young.
  • Perfect as specimen plant or for shrub borders, hedges and screens, as foundation plants. Suitable to rock gardens. Performs well in wet areas of the garden and near swamps and bogs. Attractive in containers too!
  • No serious insect or disease problems. May be affected by spider mites, bagworms or coryneum canker.
  • Low maintenance, American arborvitae tolerates shearing well for a more tailored column. Prune in early spring before onset of new growth. Provide a generous root zone mulch
  • Propagate by semi-hardwood cuttings
  • Native to Northeastern United States, Mid-Atlantic United States, Southeastern United States, North-Central United States, Central United States, Canada

Arborvitae is one of the most versatile, easy-to-grow evergreens suited to cold northern landscapes. Perfect as specimen plants, hedges, foundation plantings and windbreaks, these attractive shrubs require hardly any maintenance while contributing beautifully to our landscapes.

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Requirement
Hardiness 2,3,4,5,6,7
Heat Zones 1,2,3,4,5,6,7
Climate Zones 1, 2, 3, 1B, 2A, 2B, 3A, 1A, 3B
Plant Type Conifers, Shrubs
Plant Family Aristolochiaceae
Exposure Full Sun, Partial Sun, Shade
Season of Interest Spring, Summer, Fall, Winter, Early Spring, Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer
Height 10' - 20'
Spread 3' - 4'
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Characteristics Plant of Merit, Showy, Evergreen
Garden Styles City and Courtyard, Gravel and Rock Garden, Informal and Cottage, Traditional Garden
Planting Place