Skybound Cedar

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Skybound Cedar (Thuja occidentalis ‘Skybound’) Care Guide Overview Skybound Cedar (also known as Skybound Arborvitae or “Skybound Cedar/Thuja”) is a columnar, narrow evergreen priz ed for its upright growth habit, dense foliage, and excellent cold hardiness. It is often used as a tall screen, vertical accent, or hedge in landscapes where space is limited. Mature height: ~ 15 to 20 ft, width: ~ 4–5 ft. Exceptional winter hardiness, suitable for colder climates. Dense, dark green scale-like foliage along a narrow column. 1. Planting & Site Selection Sunlight: Full sun is best for foliage density and health. Partial shade is tolerable but may lead to thinner foliage. Soil: Prefers well-drained soil. Avoid sites where water tends to stand. Spacing: Because of its narrow form, you can space it 3–4 ft apart for a privacy screen, but more if you want full, unconfined growth. Shelter: In very exposed, windy sites, some shelter or protection from winter desiccation may be helpful. 2. Watering & Establishment First Year: Keep the root zone moist (not soggy) while the tree establishes. Deep watering is beneficial. After Establishment: More drought tolerant, but in extended dry periods supplemental watering helps maintain vigor and foliage. Mulching: Use 2–3 in of organic mulch around the base (leaving a gap at the trunk) to help retain moisture and moderate soil temperatures. 3. Fertilizing In early spring, apply a balanced, slow-release evergreen fertilizer if growth appears weak or foliage is pale. Avoid over-fertilizing, especially with high nitrogen, which may push excessive soft growth vulnerable to winter damage. 4. Pruning & Maintenance Timing: Late winter to early spring before new growth begins. How to Prune: • Remove any dead, diseased, or crossing branches. • You can lightly trim the outer growth to maintain shape or keep the column narrow, but avoid cutting deeply into old wood — cedars generally don’t regrow from bare wood. • Avoid heading cuts that remove large sections of interior branches. 5. Foliage & Seasonal Interest Foliage is dark green and dense, giving good year-round screening. In very cold or drought conditions, some browning or “flagging” of branch tips may occur — proper health and watering reduce this risk. Because of its strong vertical form, it adds architectural interest in the winter landscape. 6. Pests & Disease Management Common Issues: • Needle blights or tip blights can occur in humid, poorly ventilated sites. • Root rot may develop in poorly drained soils. • Pests like mites, scale, or bagworms may occasionally affect cedars. Prevention & Control: • Ensure good air circulation and avoid over-crowding. • Avoid overhead watering or prolonged foliage wetness. • Monitor regularly and remove infected foliage early. • Plant in well-drained soil to prevent root stress or disease. 7. Winter & Cold Protection Skybound Cedar is very cold-hardy and generally does not need special winter protection, even in harsh climates. For young plantings, a winter watering before freeze-up helps ensure the tree goes into winter well hydrated. In areas with heavy winds or sun exposure, a wind buffer or snow fencing may help reduce desiccation. 8. Landscape Uses Ideal as a narrow screen or windbreak where space is limitedGreat as a vertical accent or “spine” in hedges and mixed plantingsSuitable for tight urban landscapes where a wide tree would be impracticalWorks in formal or informal designs—providing structure and winter greenery Photo from Bylands Nursery Show more