Cashew nuts growing on a tree. The cashew-nut tree is a fast grower and an evergreen tropical tree. It grows to a height of 12m. Blossoming takes place between November and January. Seedling trees flower in the third year after planting. The fruit ripens fully within 2 months. The nut is attached to the lower portion of the cashew apple which is conically shaped. The cashew nut (seed) hangs at the bottom of the apple, and is c-shaped.