Abstract: Iron deficiency chlorosis is particularly severe in alkaline soils, with the core problem being that iron is easily fixed and has poor mobility. Compared with traditional iron fertilisers, EDDHA-Fe is stable within pH 3-12, not easily fixed, and has high utilisation, making it suitable for all types of soil. Through a combination of soil improvement, root application, and foliar spraying, chlorosis can be corrected efficiently. GROWMAX-Fe from City Max Group, as a high-quality EDDHA chelated iron fertiliser, can quickly restore greenness, provide long-lasting iron supply, and significantly improve crop growth and yield quality.