Correct and prevent plant yellowing with Liquid Iron from Bonide. This concentrated solution can be applied as a foliar spray or a soil drench. Liquid Iron contains micronutrients that your plants may be missing, causing them to turn yellow. Turn your lawn into the envy of your neighbors by turning plants from yellow back to green. Liquid Iron helps prevent chlorosis, the yellowing of normally green leaves due to a lack of chlorophyll. Apply Liquid Iron to shrubs, trees, herbaceous plants, turf and more. The concentrated product arrives ready to mix with water and apply as a soil drench or foliar spray. To use, mix with water according to label instructions and apply as directed. For full use instructions, please see product label.