Nitrogen deficiency is not a major problem in landscape palm trees unless soils are nitrogen-poor. Most palm trees generally require low levels of Nitrogen, especially in comparison to turfgrass. Symptoms of nitrogen deficiency are uniform light green color foliage and a decrease in growth.
Nitrogen deficiencies are more common on light or sandy soils. This is the nutrient deficiency that is most common in container-grown palms, whereas potassium, manganese and magnesium deficiencies are more pevalent in landscape situations.
Prevention and Treatment of Nitrogen Deficiency
Treatment with any fertilizer containing N will quickly improve leaf color. The fertilizer nitrogen should be in a slow-release form.