Sulphate of Ammonia from Vitax is fast acting fertiliser that is rich in nitrogen which promotes above-the-ground growth and also promotes rich, green foliage. The Sulphate of Ammonia is particularly beneficial for leafy vegetables and salad crops such as lettuce, spinach, rhubarb and leek. An early application of this fertiliser also will give flowering plants, shrubs and fruits an extra boost and will quickly "Green Up" a tired lawn. Simply spread evenly and fork into the top surface of the soil; ensure you water during dry conditions and apply at recommended rates throughout the growing season.