A fertilizer or fertiliser is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply one or more plant nutrients essential to the growth of plants. Many sources of fertilizer exist, both natural and industrially produced.
NPK stands for "nitrogen, phosphorus, and potassium," the three nutrients that compose complete fertilizers. ... Also implied is a percentage symbol after each number because each of the three numbers represents the percentage of that nutrient in the makeup of the fertilizer.
- Use every two weeks once, water after application.