In addition to what I KNOW, is a problem for your palm ( alkaline soil), sylvesters LOVE water. Make sure you have a bubbler on the tree and that it is working properly, and that you are getting PLENTY of water on the palm. I had a problem with Massey turning off bubblers on sylvesters in Osceola a couple years ago, and they will decline into supporting fewer and fewer nice green fronds very quickly and steadily when this happens. A good slow trickle with the hose once a week will show you if this is part of your issue within a month or 2.
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