About
A deciduous, broad tree to 20m tall and at least 15m across. The flowers are insignificant but turn into green fruit in late summer from which edible walnuts can be extracted. It has 5 or 7 oblong green leaflets on leaves up to 30cm long, which are perfumed if crushed. The leaves emerge copper-coloured then become lime green then yellow before they fall. Walnuts are produced on quite young trees - usually less than ten years old. Most walnut trees will need a pollinator of a different variety, even if self-fertile.
About the genus
Juglans are deciduous trees with pinnate leaves, and inconspicuous flowers in catkins followed by usually edible nuts
Growing conditions
SunlightFull sun, Partial shade
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained
AspectEast-facing, North-facing, South-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeFruit Edible, Trees
HabitSpreading branched
FoliageDeciduous
HeightHigher than 12 metres
Spreadwider than 8 metres
Time to full height20-50 years
Suggested usesArchitectural, Wildlife gardens
FragranceFoliage
Care notes
CultivationGrow in any deep, fertile soil. Suited to very large gardens or parks. For nut production, more than one tree is needed for cross pollination
PruningPruning group 1
PropagationPropagate by grafting
Pest resistanceMay be susceptible to aphids and walnut blister mites
Disease resistanceMay be susceptible to walnut leaf spot, walnut leaf blotch, honey fungus and coral spot