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The contorted hazelnut, known affectionately as "Harry Lauder’s walking stick," "corkscrew hazel," or "contorted filbert," is a standout ornamental shrub. Its hallmark is a gnarled, spiraled canopy that adds dramatic winter interest to any landscape.
Plant Type: Deciduous shrub
Family: Betulaceae
Genus: Corylus
Species: Corylus avellana ‘Contorta’
Native Area: Europe, Western Asia, Northern Africa
Exposure: Full sun to partial shade
Height: 8–10 ft (2.4–3 m)
Watering Requirements: Average
Soil Type: Average, well‑drained, organic‑rich
Pests & Diseases: Scale, Japanese beetles, Eastern filbert blight, leaf spot
Maintenance: Average
Hardiness Zone: 4–8
Originating from a spontaneous sport of the common hazelnut (Corylus avellana), ‘Contorta’ seldom produces nuts. Instead, its playful, twisted form and striking winter catkins (yellow, 2‑inch) make it a prized specimen. First noted in a 1853 English hedgerow, the cultivar gained popularity in the mid‑19th century and now holds the Royal Horticultural Society’s Award of Garden Merit.
• Curled, slightly hairy leaves that turn mellow brown‑yellow in fall.
• Gray bark and spiraled branches that create a dense, sculptural shape.
• Male catkins appear in late winter, adding a subtle color cue before leaf emergence.
• Suckers are usually straight; prune them at the base to maintain the twisted aesthetic.
The parent species thrives across diverse European, Asian, and African landscapes—from dense thickets to open woodlands and streambanks—indicating its adaptability to a range of soils and climates.
Spring and fall offer optimal planting times due to moderate temperatures and sufficient moisture. If you prefer a patio specimen, use a 20–25‑gallon container with a deep, well‑draining mix. Ensure the rootball is at least twice the width of the container to accommodate growth.
Full sun to partial shade is ideal. In hot climates, afternoon shade protects foliage from scorch and keeps the plant cooler.
Provide 1–1.5 inches of water weekly during the growing season, increasing during prolonged heat spells. Consistent moisture reduces stress and lowers pest susceptibility.
Favor an organically rich, moist, well‑drained mix. Amend sandy or clay soils with compost to improve aeration and moisture retention. Avoid waterlogged conditions that can lead to root rot.
Thrives best in mild summers and cold winters. In hotter regions, afternoon shade and regular watering help mitigate heat stress. Mulch around the base to regulate soil temperature and conserve moisture.
Most soils provide sufficient nutrients. If needed, apply a balanced, slow‑release organic fertilizer (e.g., 5‑5‑5) in early spring. Over‑fertilization, especially high nitrogen, can produce weak stems and increase disease risk.
Prune only to remove dead, crossing, or diseased branches. Address suckers at the base to preserve the twisted shape. Because it grows slowly, regular pruning over several seasons ensures a well‑branched, balanced form.
Commercial growers typically graft ‘Contorta’ onto the robust American hazelnut rootstock (Corylus americana). Home growers can try mound layering: during winter dormancy, cut back stems to about 1 inch above soil, cover new shoots with a mound of soil, and allow roots to form before harvesting the rooted shoots in the following dormancy cycle.
Smaller (5–6 ft tall) and tolerant of zone 9. It offers vibrant burgundy foliage that fades to green in summer, and light red catkins in early spring.
Shares the dramatic burgundy leaf color and displays dusky rose‑pink catkins. Both cultivars are grafted and require pruning of rootstock shoots to maintain color integrity.
Scale insects create sticky residues and can yellow leaves; remove affected foliage. Japanese beetles may skeletonize leaves—hand‑pick or treat soil with beneficial nematodes. A strong water jet or horticultural oil can deter infestations.
Eastern filbert blight (Anisogramma anomala) is fatal in European hazelnuts; early detection and removal of infected twigs are critical. Leaf spot manifests as brown, dead patches—prune and destroy infected leaves and apply mulch to reduce leaf wetness.
• Does it produce nuts? Rarely, only a few small nuts may appear.
• Can it be grown in containers? Yes—use a large pot (20–25 gal) and ensure proper drainage.
• What plants pair well? Low perennials such as geraniums, sedum, and juniper, as well as winter bloomers like forsythia, complement its winter form.
