Understanding Fertilizer with the Lawn Care Nut

a close up bag of 10-10-10

Why are there three numbers prominently displayed on every bag of fertilizer? Allyn Hane, “The Lawn Care Nut,” draws on his 15+ years of professional lawn care experience to answer that question and others.

“You know those three numbers that you see on every single bag of fertilizer that’s on the shelf these days? Well, today, in our Toro Yard Hack, we’re going to talk about those three numbers, what they mean, and how you can use them to stay on the right path to a successful lawn care regimen.”


Nitrogen stimulates growth and aids in the production of chlorophyll. Phosphorus is typically associated with healthy root and stem growth in grass plants. And potassium facilitates the thickening of cell walls, which in turn allow the turf to withstand outside pressures from heat, drought, insect, and disease.”

What Fertilizer is the Best?

“The reason that there are so many options available is because everybody’s got their own path, or journey, that they’ve got to take based on their own site’s conditions. That’s why in the past, we’ve talked about soil testing. You need that baseline data in order to set the strategy to move forward with your N, P, and K. It’s always a good idea to consult your local county extension service. They’ll have generally available information on how much N, P, and K is probably needed on a yearly basis for lawns in your general area. Additionally, they’ll be able to clue you in on any local restrictions that might exist on any of those elements.

For Toro, I’m Allyn Hane, The Lawn Care Nut. Hoping these tips help you further down the path to a thicker, greener, healthier lawn! And as always, I’ll see you in the lawn.”

Toro logo


The tools you need to create and maintain a gorgeous yard, all in one place.