Tropical Food 16-5-25 is a blend of essential nutrients designed for the unique requirements of palms. It is formulated to prevent the build-up of harmful salts while delivering additional potassium, magnesium, sulfur, and micronutrients. Jack’s Classic Palm Food produces lush green leaves and strong growth in both pots and landscapes. For use on palms including date, royal, queen, majesty, lady cycad sago palm and zamia.