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Juglans regia
Also called Common Walnut, Walnut, English Walnut, Carpathian Walnut, Madeira Walnut, Walnut Tree
Persian walnut is a large deciduous tree grown for its edible nuts, which are widely cultivated in temperate regions. It needs full sun, deep soil and room to grow, as mature trees can reach 15 m across.
Juglans regia, known by various common names including the common walnut, English walnut, or Persian walnut amongst other names, is a species of walnut. It is native to Eurasia in at least southwest and central Asia and southeast Europe, but its exact natural area is obscure due to its long history of cultivation.
The species has numerous cultivars which produce the edible walnut consumed around the world and produced predominantly in China. It is widely cultivated across temperate regions throughout the world including those of Eurasia, Australia, and the Americas.
Walnut trees grow best in rich, deep soil with full sun and long summers, such as the California central valley. Juglans hindsii and J. hindsii × J. regia are often used as grafting stock for J. regia. Mature trees may reach 15 m (50 ft) in height and width, and live more than 200 years, developing massive trunks more than 2.4 m (8 ft) thick.
It tends to grow taller and narrower in dense forest competition. It is a light-demanding species, requiring full sun to grow well.
Argentine Walnut · Southern California Black Walnut · Butternut · Northern California Black Walnut · Hebei Walnut · Manchurian Walnut · Little walnut · Andean walnut · Black Walnut · Walnuts · Iron Walnut · Walnut
Text excerpted from the Wikipedia article Juglans regia by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
