Keeps Grass Green, Vibrant and Healthy. Our Iron sulphate Spreader Granules contain a high level of iron and magnesium, which supports chlorophyll production, encouraging vibrant, green, and healthy grass. It’s ideal to use after scarification to bring your lawn back to life. Pro-Kleens Iron Sulphate is designed to brighten your grass. Its ideal for applying after scarification. Thanks to the high level of magnesium that supports chlorophyll production, our Iron Sulphate Spreader Granules keep your grass green and healthy all year round, whilst reducing the chance of staining. It also contains seaweed to strengthen your lawn's resilience to keep it strong and vibrant! Our Iron Sulphate Granules are just 1-2mm, meaning more granules per square metre, helping to prevent speckling when applied at lower application rates. The small particle size also allows the granules to lay lower in the soil to keep them out of view, keeping your lawn looking neat and tidy. Keep your grass looking its best with our long-lasting granules. One application will last up to 3 months to keep your grass healthy for longer. You can re-treat the area every 16 weeks if required. This product can be used all year round providing there is no risk of frost. For best results, we recommend using the product between January and December.