Hello. I am planning to plant a dwarf apple tree in my backyard in Kitsilano, Vancouver, BC. I would like to buy a tree that has a few different varieties grafted on it. Where is the best place to shop for it? I note that the upcoming UBC Botanical Garden Apple Festival will have apple trees for sale, but I didn't see any multiple-variety trees on the list posted on this website. I'd also appreciate any advice about good combinations of varieties for one tree. Thanks, Arlene.