Contains 33% iron to help plants overcome yellow leaves. F.S.T. contains iron, sulfur, manganese and zinc, which are essential elements for plant growth. F.S.T. is recommended as a supplemental feeding to the normal fertilizer program to improve growth, fruiting, flowering and helps plants overcome yellow leaves. Especially helpful to citrus, gardenias and azaleas. Helps lower soil pH.

Contains 19% Sulfur, 33% Iron, 0.50% Manganese and 0.50% Zinc.