Grow thick and healthy grass with Pro-Kleen Iron Sulphate 1kg. Iron sulphate is an iron-rich, long-lasting fertiliser that encourages your grass to grow a healthy dark green. It acts as a turf hardener to keep your grass luscious and strong all year round! The iron sulphate is used by professional greenkeepers, lawn keepers, park keepers, sports groundsmen (and more) for perfect pitches, green lawns, and superior golfing greens! It greens grass, hardens turf, and also leaves the soil slightly more acidic to improve the quality of your lawn. The 2.5kg tub of iron sulphate makes up to 2500L when diluted and covers up to 2500m2 grass greening and 1500 square metres for turf hardening! It can be applied wet or dry but for best results, we recommend using it dissolved in water for easy and even coverage.