Corylus maxima 'Halle'sche Riesennuss' (F) | filbert 'Halle'sche Riesennuss'

Synonyms

Corylus avellana 'Bollwylle', Corylus avellana 'Halle Giant', Corylus avellana 'Merveille de Bollwiller', Corylus avellana 'Merveille de Bollwyller', Corylus avellana 'Wunder aus Bollweiler', Corylus maxima 'Géant de Halle', Corylus maxima 'Monsieur de Bouweller', Corylus maxima [Géant de Halle], Corylus maxima [Halle Giant]

Shrubs Trees

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A deciduous, large shrub or small tree up to 8m high and 5m across. After the pale yellow catkins in early spring, green leaves emerge that turn pale yellow in autumn before falling. It is a heavy bearer of large nuts in autumn, harvest before the squirrels get them!

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

2.5-4 metres

Size

Time to Maturity: 5–10 years
Max Spread: 2.5-4 metres
Max Height: 4-8 metres

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full sun Partial shade

Aspect: East–facing or North–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: 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: Accepted
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: This genus produces fruit, but not necessarily edible fruit

How to Grow

Cultivation

Grow in nay fertile, well-drained but moisture-retentive soil. For more information see cobnut cultivation and filbert cultivation.

Propagation

Propagate by hardwood cuttings in autumn

Suggested planting locations and garden types

Wildlife gardens
Edible fruit

Pruning

pruning group 1

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