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How to Grow Contorted Filbert

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Contorted Filbert

Corylus avellana 'Contorta'

shrub

Contorted Filbert, also known as Harry Lauder's Walking Stick, is a deciduous ornamental shrub prized for its dramatically twisted and corkscrew-like branches. It produces small, decorative catkins in late winter and edible hazelnuts in fall, making it both beautiful and functional. The unusual branch structure becomes more pronounced and visually striking as the plant matures.

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Example Contorted Filbert timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Contorted Filbert

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Contorted Filbert

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Contorted Filbert dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun to partial shade, preferably 6+ hours of direct sunlight daily for best branch contortion and nut production
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Water: Moderate moisture; water regularly during establishment and drought periods. Once established, fairly drought-tolerant but prefers consistent moisture. Avoid waterlogging.
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Spacing: 72 inches
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Days to maturity:
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Planting depth: Plant at same depth as root ball; top of root ball level with soil surface

Soil

Type: Well-draining loamy to clay soil
pH: 6.0-7.0
Amendments:
Compost or aged manure for fertility Peat moss for moisture retention Perlite or sand if drainage is poor

Growing Zones

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Zones 4-8; best performance in cooler climates with cold winters

4a 4b 5a 5b 6a 6b 7a 7b 8a 8b

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Growth Stages

1

Establishment (Year 1-2)

1-2 years

Young plant develops root system and begins branching. Initial twisted structure may not be fully visible. Growth is relatively slow.

Water consistently to establish deep roots. Mulch around base to retain moisture. Prune minimally; focus on removing dead or crossing branches.

2

Vegetative Growth (Year 2-5)

3-4 years

Branch structure becomes more apparent and contorted. Shrub grows to mature size (8-10 feet tall and wide). Foliage is bright green and ovate.

Minimal pruning needed; remove crossing or damaged branches only. Maintain shape if desired. Apply balanced fertilizer in spring.

3

Flowering (Winter to Early Spring)

4-8 weeks

Produces distinctive male catkins (long, pendulous structures) in late January-February before leaves emerge. Tiny red female flowers appear on branch tips.

Do not prune during or just before flowering to preserve catkins. These are pollinated by wind; having a second plant improves nut set.

4

Fruiting (Summer to Fall)

5-6 months (June-November)

Small clusters of hazelnuts develop in husks on branch tips. Nuts mature and husks brown. Foliage remains healthy and green.

No special care needed. If desired, thin nut clusters for larger individual nuts. Watch for pest activity.

5

Dormancy (Winter)

3-4 months

Deciduous foliage drops in fall. Bare contorted branches become the main ornamental feature. Plant enters dormancy.

Best time to appreciate branch structure and perform dormant-season pruning if needed. No watering required unless extremely dry.

Companion Planting

Plan your garden →

Plant with:

Winterberry holly Red-twig dogwood Serviceberry Witch hazel Ornamental grasses Hellebores Snowdrops

Avoid planting near:

Black walnut (produces juglone, toxic to many plants) Plants requiring dry conditions (Contorted Filbert prefers moisture)

Common Pests

  • Maintain tree vigor; remove infested branches; avoid wounds; use insecticides only if severe damage occurs

  • Prune out infected branches (12 inches below visible cankers); disinfect tools; improve air circulation; resistant varieties recommended in affected regions

  • Harvest and destroy fallen nuts; pick infested nuts from tree; allow birds and ground predators to feed on larvae

  • Spray with water to dislodge; apply neem oil or sulfur; maintain humidity around plant

  • Prune affected leaves; apply insecticidal soap; encourage natural predators

Uses

🍳

Edible Hazelnuts

Culinary

The nuts are edible and can be eaten raw or roasted, used in baking, or ground into hazelnut butter. While production is often lighter than commercial hazelnut varieties, homegrown nuts are fresh and flavorful. [source]

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Winter Branch Arrangements

Household

Cut twisted branches in late winter provide stunning decorative material for indoor vases and floral arrangements, lasting several weeks in water and making dramatic statement pieces. [source]

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Wildlife Food and Shelter

Wildlife

Hazelnuts and catkins provide food for squirrels, birds, and other wildlife. The dense branch structure offers shelter and nesting habitat for birds. [source]

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Architectural Garden Feature

Ornamental

The uniquely twisted and spiraling branches create a living sculpture that is especially striking in winter when bare, serving as a focal point in garden design and drawing year-round interest. [source]

💊

Traditional Herbal Use

Medicinal

Hazelnut oil and leaves have been used in traditional herbal remedies to support circulation and venous health, though modern clinical evidence is limited. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Hazelnuts mature in fall (September-October in most regions). Harvest when outer husk turns brown and nuts fall to ground, or shake branches to encourage dropping. Collect promptly to prevent squirrel damage. Crack open to check kernel maturity (should be hard, not soft). Dry nuts in warm, well-ventilated area for 2-3 weeks before storage. Store in cool, dry place for up to 2 years. For ornamental catkins, simply enjoy on the branch in late winter—no harvest needed.

Fun Facts

  • 🌱 The cultivar name 'Contorta' literally means 'twisted' in Latin, and the common name 'Harry Lauder's Walking Stick' comes from a Scottish music hall comedian of the early 1900s whose wooden walking stick resembled the plant's branches.
  • 🌱 A mature Contorted Filbert can live 50-80 years or longer, becoming an increasingly dramatic sculptural element in the landscape as it ages.
  • 🌱 The catkins can reach 4 inches long and dangle in bunches, creating a showy winter display that often attracts photographers and garden visitors.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun Mulch Partial Shade
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