Do you live in Cape May Susan? I don't know alot about protecting palms since I opted for the needle palm in which case I simply threw it out in front of my house and basically just left it alone 5 years ago and its thrived through 3f lows... so all i can say is maybe prune some of the leaves and wrap them??? and maybe just try to protect it from those winter winds that will make it seem colder than what it is...
Heck if I were you id just let it ride this winter out and let it prove its hardy palm name like you said it is established by now but I dont know if thats a gamble your willing to take since you could possibly lose 4 years of growth. GL
Looking good Susan I would mulch the ground and use leaves as much as you feel like it. I did not mulch or protect my grapefruit at all and it defoliates but does fine. Now we might have additional heat in summer that makes it stronger but yours looks pretty strong! Thanks for posting a photo of that I was curious. Mine looks really good and I've been very impressed with its hardiness.
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