Great info, Ursula. Thanks! I buy a product for my palm trees called Kmag. It is a 0-0-22 with 10.80 % magnesium. It is a Lesco product sold at John Deere Enterprises stores. I have only seen it in 50 pound bags but you can always feed it to your palms and they will love you for it. I use a 50 pound bag of it every December to help my palms get through the winter.
Jim