Macronutrients are those that the grass plant needs in the greatest quantities to perform.
The big 3 are Nitrogen (N), Phosphorus (P), and Potassium (K). When you see 3 numbers on bags of fertilizer, those are representative of these 3 and they are in percentages.
This is a standard - ALL fertilizers will have this analysis on the bag/bottle.
Above is pictured from a general-purpose fertilizer found at box stores.
The analysis 16-0-8 stands for N-P-K and tells you that 16% of the bag’s contents are nitrogen and 8% are potassium. So in this example, there is no phosphorus in this product.
There are 4 other macronutrients needed in lawns:
If the fertilizer you purchase contains these, it will list them elsewhere on the label in percentages.
Keywords: fertilizer, macronutrients, numbers, nitrogen, potassium, phosphorus