Juglans regiaJuglans Regia, commonly know as the Walnut tree, is a deciduous fruit tree, with green, pinnate leaves. In early spring, yellow green catkins begin to bloom, continuing until early summer, before fruits begin to grow and ripen. Fruits emerge green, and the first crop will usually be when the tree is around 4 5 years old. Walnuts generally ripen in autumn, although they can have a chewy texture when eaten straight after picking. They are best eaten