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Fertilizer Numbers - NPK Ratio

This discusses the numbers on fertilizer, the NPK ratio which is an acronym for Nitrogen, Phosphorous and Potassium. A quick way to remember how the numbers affect the plant is to think of the three NPK numbers as Up, Down and All Around. This means that the "Up" Nitrogen helps the green part of the plant you see to grow greener and quicker, the "Down" Phosphorous helps the roots and what the plant yields such as fruit or flowers, and the "All Around" Potassium helps with general plant health. It is important to remember that it is possible to have too much of a good thing with too much fertilizer creating a toxic environment that plants cannot survive in.