Advantage 8-11-20 is a quality compound fertiliser. With high concentrations of the key macro-nutrients nitrogen, phosphorus and potassium, it’s an ideal starter fertiliser for a range of horticultural and arable crops. The high potassium content in Advantage 8-11-20 (with half of this potassium supplied in the form of sulphate of potash) means it is commonly used for potatoes.