In the realm of plant nutrition, ensuring adequate iron availability is critical for healthy growth and vibrant green foliage. Two common forms of iron supplements are Ferrous Sulfate and Chelated Iron. Understanding their differences, applications, and how they interact with soil conditions is key for gardeners and agricultural professionals. As a dedicated chemical manufacturer and supplier, we provide insights into choosing the right iron source.

Ferrous Sulfate (CAS 7720-78-7), appearing as blue-green crystals with ≥98% assay, is a widely used and cost-effective iron source. Its primary benefit lies in its direct availability as an iron salt. It is particularly effective in acidic soils (pH < 7) where iron remains soluble and readily absorbed by plant roots. Additionally, Ferrous Sulfate has a soil-acidifying effect due to its sulfur content, which can benefit acid-loving plants and improve nutrient availability in alkaline soils over time.

Chelated Iron, on the other hand, involves iron molecules bound to chelating agents (like EDTA, DTPA, EDDHA). This binding process protects the iron from reacting with soil components, keeping it soluble and available to plants across a wider range of soil pH levels, including alkaline conditions. Chelated iron offers a more stable and prolonged release of iron, making it an excellent choice for plants with high iron demands or when soil pH is a significant limiting factor.

For agricultural applications where soil conditions are consistently alkaline, or for horticulturalists dealing with sensitive plants, Chelated Iron often provides more reliable results. However, for general soil conditioning, correcting mild iron deficiencies in slightly acidic to neutral soils, or when cost-effectiveness is a major consideration, Ferrous Sulfate is an excellent option. Many farmers choose to buy Ferrous Sulfate due to its favorable price and its dual action of providing iron while also improving soil pH.

As a reliable supplier based in China, we offer both Ferrous Sulfate and related compounds. When deciding between them, consider your specific soil pH, plant species, and desired outcome. For bulk purchases and consistent quality, partnering with an experienced chemical manufacturer ensures you receive the best product for your needs. Whether you choose Ferrous Sulfate for its broad utility or Chelated Iron for specialized conditions, informed selection leads to healthier plants.