Fertilizer is simply a substance that is given to the soil to boost plant productivity. There are natural fertilizers, like manure, and artificial fertilizers. NPK fertilizers are those that have nitrogen (N), phosphorus (P), and potassium (K) in them (K). Each ingredient has been discovered to benefit plant health and attractiveness. Nitrogen, for example, boosts leaf development, phosphorus promotes fruit and/or flower production as well as root growth, and potassium stimulates general plant health