what does the 3 numbers on fertilizer bags mean

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N-P-K ratio

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  • What do the numbers on a bag of fertilizer mean?

  • These nutrients are the three numbers on a fertilizer bag listed in order (N-P-K). So, a fertilizer that contains 5-10-10 means it has 5 percent nitrogen, 10 percent phosphorus (phosphate), and 10 percent potassium (potash). A 鈥渃omplete鈥?fertilizer contains all three. What do the different nutrients do? Each nutrient plays a different role.

  • What do the numbers on weed and feed bags mean?

  • The three numbers found on weed and feed bags show the percentage of nitrogen, phosphorus and potassium, in that order, in the fertilizer portion of the formula. The first number on the fertilizer label is nitrogen (N). The number represents the percent of nitrogen in the fertilizer per weight.

  • What is the percentage of nitrogen in a bag of fertilizer?

  • Though plants use many different nutrients to fuel their growth, these three are used in the largest amounts. For example, a bag of fertilizer with the fertilizer numbers 10-5-10 on the label, holds 10% N, 5% P, and 10% K.

  • How much phosphorus is in a bag of fertilizer?

  • It鈥檚 important to note that the Nitrogen, Phosphorus, and Potassium numbers on your fertilizer are percentages. For instance, a bag labeled with 鈥?3-3-8鈥?will contain 23% Nitrogen, 3% phosphorus, and 8% Potassium.

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