Answer: You can certainly plant these near each other. How far apart they need to be depends on the mature size of each tree. (Dwarf trees can actually be fairly large at maturity, it depends on specific variety you are planting.) Check the expected mature size then plant at least far enough apart that they will not touch when they reach full size. The more space between them the better in that they will have good air circulation throughout and also will not shade each other or compete with each other's roots. I hope this helps.
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