Yes you can actually grow different varieties of apples on an existing tree! Over grafting simply explained - a must watch! Multiple cultivars of fruits such as apples are sometimes grafted on a single tree. This so-called "family tree" provides more fruit variety for small spaces such as a suburban backyard, and also takes care of the need for pollinators. The drawback is that the gardener must be sufficiently trained to prune them correctly, or one strong variety will usually "take over." also see - apple trees - fruit trees - pruning fruit trees - rootstock selection - trees & shrubs - wild fruit trees Grafting or graftage is a horticultural technique whereby tissues from one plant are inserted into those of another so that the two sets of vascular tissues may join together. This vascular joining is called inosculation. The technique is most commonly used in asexual propagation of commercially grown plants for the horticultural and...