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Author: Nikki Phipps  

Standing in the fertilizer aisle of a garden or farm store, you are faced with a dizzying array of fertilizer options, many with a series of three numbers like 10-10-10, 20-20-20, 10-8-10 or many other combinations of numbers. You may be asking yourself, “What do the numbers on fertilizer mean?” These are NPK values, which leads to the next question of, “What is NPK?” Keep reading to learn more about fertilizer numbers and NPK. What Do the Numbers on Fertilizer Mean? The three numbers on fertilizer represents the value of the thre ...