Apples are generally propagated by grafting. Temperature : Suitable to grow in areas with temperatures less than 35?C . Apple tree is a deciduous tree in the rose family best known for its sweet fruit. It is cultivated worldwide as a fruit tree, and is the most widely grown species in the family Rosaceae.They're commonly used in recipes like pies, cookies, muffins, jam, salads, oatmeal, or smoothies. They also make a great snack or wedged and smeared with nut butter. In addition to their culinary versatility and numerous colors and flavors, apples are an exceptionally healthy fruit with many research-backed benefits.