Answer: Based on your description, it is possible what you are seeing is normal, being the early development of next year's new growth. However, after such a hot and dry summer, it is also possible you are seeing the delayed effects of that or some other stress. Finally, these trees are also susceptible to mites and this also can become visible in the fall, although I would expect mite damage to be evident over more than just the tops. At this point I would suggest you consult with your county extension and/or professionally trained nursery staff to determine the cause of the browning and decide what you might need to do, if anything. Good luck with your trees!
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