First the numbers are the percentage (by weight) of the three major ingredients used in plant growth. N-P-K, I know, flashback to High School Chemistry class, yuck! The N stands for Nitrogen, the P is for Phosphorous, and the K is for Potassium (sometimes called Potash.) They are in alphabetical order, so it is easy to remember them.
About the author: Carrie Longacre is a Mommy to a very active toddler, Hannah, and wife to her Landscaper husband, Marc. Carrie has been gardening ever since she could walk and has a degree in Horticultural Business from Penn State University.