Apple trees are grown world wide,and most of them are  available any time of year. Here are a few lesser known varieties.   Red Delicious-  Slightly Sweet, tends to go mushy when cooked.     Jonagold-  Slightly tart, a cross between Golden Delicious and Jonathon.     Pink Lady –   Sweet and crispy.       Crabapple-  A small hard tart apple , very suitable for jam  making.