Instant-Gro All Purpose Compound Fertiliser contains a blend of nitrogen, phosphorus and potassium along with added magnesium, sulfur, calcium and micronutrients, which deliver an instant boost and greening effect to your garden for up to 3 months. It is ideal for use on most indoor and outdoor potted plants and garden applications (not suitable for plants that are highly sensitive to phosphorus such as certain banksias, proteas and grevilleas).