Plants > Trees

black walnut

Juglans nigra (F)

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Genus: Juglans
Family: Juglandaceae
Common Names: American walnut

About this plant

J. nigra is a vigorous, large, deciduous, broad-crowned tree with large pinnate leaves composed of 15-21 lanceolate leaflets, with 10cm long male catkins and insignificant female flowers followed by globose green fruits, 5cm wide

Growing Information

Height

Higher Than 12 Metres

Spread

Wider Than 8 Metres

Hardiness

H6

Foliage

Deciduous

Growing Conditions

Sunlight

Full Sun

Soil

ClayChalkLoamSandy

pH

AcidAlkaline

Not Currently Available

This plant is not currently stocked at any garden centres on our platform.

Neutral

Moisture

Poorly DrainedWell Drained

Aspect

West FacingEast FacingSouth Facing

Exposure

ShelteredExposed

Care Guide

Cultivation

Grow as a specimen tree in any well-drained or moist but well-drained soil in full sun

Pruning

Pruning group 1

Propagation

Propagate by seed or grafting

Pests

aphids and walnut blister mites may be a problem

Diseases

Coral spot and a leaf spot may be a problem

Garden Uses

Season of Interest

SpringSummerAutumn

Size & Characteristics

Height

Higher Than 12 Metres

Spread

Wider Than 8 Metres

Habit

Bushy

Time to Full Height

Over Hundred Years