Fertilizers are rated by three numbers, such as 10-6-4.  The numbers tell what percentage of primary nutrients the fertilizer contains. 
  • The first number is the percentage of Nitrogen
  • The second number is the percentage Available Phosphate
  • The third number is the percentage of Soluble Potash.

  • When purchasing fertilizer, keep in mind that typically the first number, or nitrogen, emphasizes a green color and denser foliage. 
  • The middle number, Available Phosphate, emphasizes the development of flowers, fruits, or vegetables. 
  • And the third number, Soluble Potash, emphasizes overall plant hardiness and its ability to withstand stress.
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How To Read A Fertilizer Label