Every spring my Bahiagrass lawn develops yellow spots even though I fertilized. What causes this?
These yellow spots indicate iron deficiency in Bahiagrass. In spring, Bahiagrass grows so rapidly that it cannot keep up with its own nutritional demand for iron. It is best to make supplemental iron applications and avoid heavy fertilization or a fertilizer high in water-soluble nitrogen since this will encourage excessive growth and increased demand for iron. Keep in mind that insects, diseases, high pH, and soil compaction can also cause yellow spots in the lawn so rule these problems out first before making a recommendation. Centipedegrass and sometimes St.Augustinegrass, also have problems with iron deficiency.
