N-P-K: The elemental shorthand for the three major nutrients in fertilizers. “N” stands for Nitrogen, “P” stands for Phosphate (P2O2) and “K” stands for Potash (K2O). These are the chemical forms of nitrogen, phosphorus and potassium that are present in fertilizers.
All fertilizer has a guaranteed analysis (by law), which means a bag of the most expensive, nationally branded 5-10-4 contains the same amount of fertilizer as a bag of the generic, store brand 5-10-4. The difference is in the additives that companies “add” to the fertilizer to create a multipurpose product. Check this video for more information.
Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.
Phosphorus moves slowly through the soil, it’s important to work it into the soil, where it’s needed by the roots. Potassium helps regulate plant metabolism and affects water pressure regulation inside and outside of plant cells. It is important for good root development.
Potassium helps regulate plant metabolism and affects water pressure regulation inside and outside of plant cells. It is important for good root development. For these reasons, potassium is critical to plant stress tolerance.Phosphorus is involved in the metabolic processes responsible for transferring energy from one point to another in the plant. It’s also critical in root development and flowering. Because phosphorus moves slowly through the soil, it’s important to work it into the soil, where it’s needed by the roots.
Potassium. In plants it is essential for water uptake and for synthesizing plant sugars for use as food. It also is responsible for crop formulation and quality. Commercial bloom foods contain high amounts of potassium to promote more flowers of better quality. Potash in soil is the initial source for the uptake in plants. potash and plants is clear in the promotion of bigger fruit and vegetable yields, more abundant flowers and increased plant health.
Read more at Gardening Know How: What Is Potash: Using Potash In The Garden https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/using-potash-in-garden.htm