Norfolk Island Pine

Norfolk Island Pine

Hi to all! I have a question regarding my indoor Norfolk Island pine. It was given to me as a gift about a year ago and has been in fine health until fairly recently. Those who are familiar with these pines will know they have a variety of stalks coming out of the soil and each stalk has its own frond (for lack of a better term). My pine has about six or seven total stalks. Basically, two or three of these stalks have suddenly dried up and become "crispy." They're still quite green, but they're brittle, and the difference between the sickly stalks and the healthy ones is quite marked. Strangely, I have no reason to believe this problem is due to lack of water, since this plant is watered regularly. Nor do I have reason to believe it is due to lighting; it has resided in the same general area in my apartment for the duration of its life and has been healthy up until now. I really don't want to have to remove these dried out stalks. Does anybody have any experience with these pines and/or any tips as to how to revive them? Thanks in advance! Note: For zone purposes, my pine and I are in central Florida.
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