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Thuja

Skybound Cedar

Thuja occidentalis

Also known as: Skybound Arborvitae, Ultra-Hardy Columnar Cedar

  • Evergreens
  • Zone 2
  • Full Sun to Part Sun
  • Medium
  • 4.5–6 m
  • 1.2–1.5 m
  • 1.2–1.5 m
  • Low

Toxic to pets.

Skybound Cedar is an ultra-hardy columnar arborvitae selected for prairie winters. Dense green foliage and a narrow upright habit make it ideal for screens, accents, and formal evergreen lines.

Soil
Well-drained, Clay, Loam
Native status
Introduced
Growth rate
Moderate
Foliage colour
Green
Foliage habit
Evergreen
Landscape use
Hedge, Specimen, Border
Attracts
Birds
Resistant to
Disease

Care guides

Watering

Skybound Cedar (Thuja occidentalis) needs deep, thorough root irrigation during its first 1–2 growing seasons in Steinbach so roots push well below the prairie frost line. Water slowly at the base until moisture reaches the outer root zone—typically a deep soak once or twice a week in hot, windy weather rather than daily shallow sprinkling, which encourages weak surface roots. After establishment, water deeply during prolonged drought and while fruit or new shoots are sizing in July–August. Avoid chronically waterlogged clay, which smothers roots. This selection is rated around Canadian zone 2; snow cover helps, but dry open winters still demand that late-fall soak.

Sunlight

Skybound Cedar (Thuja occidentalis) should be placed in full sun or part sun. Aim for strong morning sun and lighter afternoon conditions—about 4–6 hours of direct light is usually ideal. In Steinbach heatwaves, unfiltered late-afternoon sun can pause flowering or crisp soft foliage, so a site with dappled afternoon relief often outperforms an all-day reflective south wall. Deep shade, however, stretches stems and cuts bloom count sharply. At a mature size around 4.5–6 m, give neighbouring plants enough space so they do not shade out the crown as the season progresses.

Pruning

Maintenance on Skybound Cedar is minimal. In early summer after the main flush, lightly tip-prune only to maintain outline if required. Do not cut back into bare brown wood that lacks green needles or sprays—those areas rarely resprout. Remove snow-broken or winter-burned tips cleanly in spring. Note: clippings and foliage may be toxic to pets if chewed; site plants and dispose of trimmings accordingly.