|This variety bears medium to large yellow fruit with thick skin. The flesh is tart, crisp and acidic. Good for sauces and pies. There are varieties of apples suitable for almost all of the climate zones in the United States. They prefer cold winters, moderate summer and high humidity. Apples are deciduous and must be pollinated in order to produce fruit. Apple trees should be pruned in summer and winter. Codling Moths are one of the most serious apple pests.