Pro-Kleens Iron Sulphate helps to promote thicker, greener and healthier grass in just 4 days! Iron sulphate is an iron-rich, long-lasting fertiliser that encourages your grass to grow a healthy dark green. Its the perfect product to use for gardens that need some TLC! It also acts as a turf hardener to keep your grass luscious and strong all year round. This incredible garden fertilizer is used by professional greenkeepers, lawn keepers, park keepers, sports grounds men (and more) for perfect pitches, green lawns, and superior golfing greens! Thanks to the 3-in-1 formula, Pro-Kleens Iron sulphate offers incredible value for money. It greens grass, hardens turf, and also leaves the soil slightly more acidic to improve the quality of your lawn. ProKleen Iron Sulphate Lawn Tonic Feed Easily Soluble Damp Powder 1 x 2.5KG in Green