Rose family seeds (that includes apple) are truely dormant when harvested. Those I set out W/S around solstice.
Many tree seeds that require cold stratification are not dormant. The tip of a root peeking out of pawpaw, persimmon, white oak, chestnuts give hint to their activity. Those I set out about March 15th deeply bermed in their pot and well mulched. Till plant out they loaf in the fridge.