NPK - Understanding your fertiliser

What does NPK stand for? When you see a bag of fertiliser, you often see the letters NPK on them and some numbers by or below them. This information is so customers can compare products. These three numbers form the fertiliser's N-P-K ratio. This simply is the percentage of three plant nutrients in order: Nitrogen (N), Phosphorus (P) and Potassium (K), it reflects each nutrient's percentage by weight. For example, a 10 kg bag of Lawn Fertiliser with NPK 30-0-4 reveals that it contains 30 percent Nitrogen, 0 percent Phosphorus and 4 percent Potassium, in addition to its other beneficial...