Corylus avellana 'Twister'

RHS Plant Profile

hazel 'Twister'

Shrubs

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Deciduous shrub about 1.5m tall, grown for its attractive twisted and contorted stems. Produces heart-shaped, toothed mid-green leaves that turn yellow in autumn, and pendent yellow catkins in late winter and early spring followed by edible fruits in autumn

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1-1.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Alkaline or Neutral or Acid

Position

Full sun Partial shade

Aspect: East–facing or South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Betulaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy, Spreading branched
Genus: Corylus are deciduous trees and large shrubs with broad leaves, and showy male catkins in early spring, followed by edible nuts
Name Status: Unresolved

How to Grow

Cultivation

Grow in any moist but well-drained soil in sun or partial shade, ideal for chalky soils, large container cultivation and good for flower arranging. For more information see cobnuts and filberts

Propagation

Propagate by layering

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Edible fruit
Flower borders and beds
Cut flowers

Pruning

Pruning group 1 but regular pruning not required

Pests

May be susceptible to caterpillars, gall mites, aphids and sawflies. Squirrels like to feed on the nuts

Diseases

May be susceptible to honey fungus, silver leaf and Powdery mildews