The Jonathan apple is a medium-sized sweet apple, with a strong touch of acid and a tough but smooth skin. This variety of apples was discovered in Woodstock, N.Y., in the 1920s and is known for its use in pies and applesauce. This crimson apple with occasional touches of green has a spicy tang that blends well with other varieties in sauces and cider. Jonathan is typically available from September through April.