About
Juglans regia, the common walnut, is a broad-crowned, medium-sized, deciduous tree reaching up to 30 m tall with smooth, grey bark becoming fissured with age. Aromatic, pinnate leaves of 5�7 large, oval leaflets emerge bronzed. Male catkins to 10 cm and female flowers appear in spring, followed by rounded, 5 cm green fruits containing the familiar edible walnut. A classic specimen and productive tree.
About the genus
Juglans, the walnuts, are large, deciduous trees with aromatic, pinnate leaves, insignificant flowers in catkins and edible or ornamental nuts enclosed in fleshy green husks. Grown as specimen trees and nut crops.
Growing conditions
SunlightFull sun
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectEast-facing, South-facing, North-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeTrees
HabitSpreading branched
FoliageDeciduous
HeightHigher than 12 metres
Spreadwider than 8 metres
Time to full height20-50 years
Suggested usesSpecimen planting, large borders, parkland settings.
Native toEurope to C Asia
Care notes
CultivationGrow as a specimen tree in any well-drained or moist but well-drained soil in full sun
PruningPruning group 1
PropagationPropagate by seed or grafting
Pest resistanceMay be susceptible to aphids and walnut blister mite
Disease resistanceMay be susceptible to walnut leaf spot, walnut leaf blotch, honey fungus and coral spot