Fast, efficient, long lasting method of fertilizing palm trees. Carefully formulated to effectively fertilize your palms while protecting them from the common deficiencies of manganese, magnesium, potassium and iron. Contain nitrogen plus soluble manganese, magnesium, potassium, iron and copper sulfates. Their release has been slowed by the use of proprietary binders to safely release the nutrients to the feeder roots of your palms - right where they are most effective.