Hello, apple trees are pruned primarily in the winter during dormancy. Phelsuma provides a couple of very good links to apple pruning info in this thread: http://www.botanicalgarden.ubc.ca/forums/showthread.php?t=9713&highlight=pruning+apple Our apple tree on the Sunshine Coast, BC gets partially pruned by the bear that comes around each fall. So I have to do a little early pruning to repair the damage.