EKM-Fe Iron Sulphate Heptahydrate 25kgsMain Key Benefits: Sulphate of Iron 20% EKM Fe is very effective at controlling moss on your lawn. It can be applied wet or dry, to use: Apply 5 10g of solid crystals direct to each 1m2 of Lawn. Only apply solid product when it is raining or about to rain; if not dissolve 5 10g in 1 litre of warm water and apply in sprayer with a knapsack sprayer, or even a watering can. For ease of spreading dry mix 2 3Kg of product with 4 5Kg of sand per 100m2.