Citrus Food is a fertilizer for all varieties of citrus and avocado trees and is formulated for sturdy growth and an abundance of fruit. This product also contains sulfur and calcium to aid in improving alkaline soils and water penetration; it includes iron to aid in the prevention of chlorosis. This product contains ammonic and urea nitrogen. Citrus Food contains 6% Calcium, 8% Sulfur, 0.10% Manganese, 0.10% Zinc, and 1.25% Iron.