Encourages grass to grow stronger, healthier and greener!For grass greening: Mix 1-2g of Iron Sulphate per 1L of water. 1L of the solution will cover 1m² of grass. Apply to your grass using a pump sprayer or a watering can. For turf hardening: Mix 2-3g of Iron Sulphate per 1L of water. 1L of the solution will cover 1m² of grass. Apply to your grass using a pump sprayer or a watering can.