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Cashew nut trees grow flowers during winter, not summer. They also set their fruit during winter. The tree produces rose-colored fragrant flowers in panicles. These develop into edible red fruits, called cashew apples. The nuts grow in shells at the bottom end of the apples. The shell of the cashew nut contains a caustic oil that causes burns and skin irritation on contact. One method to separate the nuts from the caustic shell is to freeze the cashew nuts and separate them while they are frozen. You’ll want to don gloves and a long-sleeved shirt for protection, and maybe safety glasses.Both the cashew apples and the nuts are good for you. They are highly nutritious, with high amounts of vitamin C, calcium, iron, and vitamin B1.