FoxFarm Bush Doctor Liquid Iron, 1 galGive your plants a shot at greatness with Bush Doctor Liquid Iron! Iron is essential to plant growth, playing a vital role in green up, energy production, and nitrogen fixation. Bush Doctor Liquid Iron is like a vitamin for your plants, giving them a boost of iron when they need it most. You wouldn't train for a marathon without taking a nutritional supplement, would you? For use on trees, shrubs, citrus, roses, and lawns. OMRI listed for organic use