Cedar of Lebanon (Cedrus libanitica subsp. stenocoma)

Overview

The Cedrus libanitica subsp. stenocoma, often referred to as the Cedar of Lebanon, represents a particularly rugged and desirable cultivar, originating from the Taurus Mountains of Turkey. This subspecies is valued by gardeners primarily for its superior winter hardiness compared to the straight species, allowing cultivation in cooler climates like USDA Zone 5. Its form remains more upright and rigid throughout maturity, offering a strong vertical accent in the landscape where other cedars might sprawl.

As a magnificent needled evergreen conifer, the Cedar of Lebanon eventually develops into a stately specimen, characterized by dense, dark green needles. While slow-growing initially, this tree reliably matures to heights of 40 to 60 feet, rewarding patient gardeners with timeless, substantial structure. It makes an excellent, long-lived focal point plant destined to anchor large, sunny landscape areas for generations.

The architectural presence of Cedrus libanitica subsp. Stenocoma makes it a superb choice when planning large estates or expansive foundation plantings where imposing structure is desired. Its status as a dependable, low-maintenance evergreen, combined with its inherent drought tolerance once established, ensures high practical value for the dedicated enthusiast.

Fast Facts

• Plant Family: Pinaceae
• Plant Type: Needled evergreen
• Hardiness Zones: USDA Zones 5-7
• Size at Maturity:
  • Height: 40-60 ft
  • Spread: 30-50 ft
• Bloom Time: Non-flowering
• Bloom Description: Non-flowering
• Sun Exposure: Full sun
• Water Needs: Medium
• Maintenance Level: Medium

How to Grow

Plant Cedrus libanitica subsp. stenocoma during the cooler transition seasons—early spring or fall—to minimize transplant shock. Success hinges on providing the correct soil structure. This tree thrives best when situated in acidic, sandy soils that are medium in moisture and exceptionally well-drained. Avoid any location prone to standing water, as wet, poorly drained soils are detrimental to its root health.

Water needs are considered medium, especially when young. Ensure consistent moisture during the first few growing seasons until the root system is fully established. Established specimens of the Cedar of Lebanon exhibit notable drought tolerance, though supplemental water during prolonged summer droughts is always beneficial. Fertilizing is rarely necessary for mature trees; focus your efforts on amending the soil at planting time rather than relying on synthetic inputs later.

Minimal pruning is required due to the naturally columnar habit of subsp. Stenocoma. Prune only to remove dead or crossing branches, generally during the dormant season. Because this evergreen holds its lower branches, often to the ground, ensure adequate clearance is provided at planting time to accommodate its mature spread of 30 to 50 feet.

Landscape Uses

The commanding presence of the Cedar of Lebanon dictates its use as a specimen or focal point plant in large settings. Its permanent structure and dense foliage make it an exceptional choice for anchoring the corners of large property lines or providing year-round screening. Due to its eventual size, avoid planting near structures or underneath utility lines.

Consider pairing this majestic conifer with contrasting deciduous trees that offer seasonal color, such as Japanese Maples or flowering Dogwoods, which can provide textural and color contrast in the summer and fall margins around the evergreen structure. The deep green to blue-green needles of Cedrus libanitica subsp. Stenocoma pair beautifully against the lighter greens of deciduous shrubs.

This tree is best reserved for large, sunny landscape areas where its 40-foot minimum mature height can be fully appreciated. It functions perfectly as a backdrop element, allowing shorter, colorful perennials and shrubs to take center stage in the foreground.

Standout Features

Noteworthy Characteristics

Cedrus libani, commonly called cedar of Lebanon, is a needled evergreen conifer that, with age, develops a massive trunk, a flattened top and broad spreading horizontal branching. Subsp. Stenocoma is a columnar form that is particularly noted for having better winter hardiness than all other forms of cedar of Lebanon, having shorter needles and narrower cones. Needles typically range from green to glaucous blue-green, resulting in a generally dark green presentation in summer.

Tolerances

• Drought

Potential Problems

This plant generally experiences no serious insect or disease problems, contributing significantly to its low maintenance profile once established. Vigilance, especially in humid environments, should be maintained for fungal issues, though its preference for sharp drainage mitigates most risks. Confirming good air circulation around the branches and avoiding overhead watering can help prevent common evergreen diseases. Should pests such as scale or bagworms appear, they can usually be managed through targeted horticultural oils or manual removal.

Frequently Asked Questions

What hardiness zones is Cedar of Lebanon suitable for?

The Cedrus libanitica subsp. stenocoma is well-suited for cultivation in USDA Hardiness Zones 5 through 7, benefiting from its enhanced cold tolerance.

How large does Cedar of Lebanon grow?

When mature, this specimen of Cedrus libanitica subsp. Stenocoma typically reaches a height between 40 and 60 feet, with a corresponding spread of 30 to 50 feet.

What sun exposure does Cedar of Lebanon need?

This variety requires full sun exposure to develop its best density and hardiness. It can tolerate some degree of light shade, but full sun is highly recommended.

When does Cedar of Lebanon bloom?

The Cedar of Lebanon is classified botanically as non-flowering, as is typical for conifers of the Pinaceae family; propagation is achieved via cones rather than traditional blooms.

Conclusion

Cedrus libanitica subsp. stenocoma offers gardeners a distinctive, architecturally sound, and remarkably hardy evergreen presence ideal for large-scale planning. Its improved cold tolerance makes this specific Cedar of Lebanon an excellent choice where other cedars struggle. Before planting, confirm your site provides full sun and excellent drainage compatibility with Zones 5-7 requirements.

Companion Planting

When planning the understory or surrounding plantings for Cedrus libanitica subsp. stenocoma, select species that share its requirements for full sun and well-drained, slightly acidic soil. Avoid moisture-loving plants directly adjacent to the base, as this could create the poorly drained conditions the cedar dislikes. Alternatives that handle drier, high-light conditions, such as various ornamental grasses or hardy, sun-loving Mediterranean herbs, thrive well beneath its canopy margins.

Design Ideas

For modern or minimalist landscapes, the rigid, upright posture of the subsp. Stenocoma offers powerful geometric contrast against more fluid plants. Use two specimens symmetrically placed at the entrance to a long driveway to create a grand, formal approach. In a naturalistic setting, allow the lower branches of the Cedar of Lebanon to sweep the ground, creating an imposing, almost ancient foundation that anchors the entire garden composition.