Those letters stand for the nutrients nitrogen (N), phosphorus (P), and potassium (K). The numbers you see on the bag (20-0-3, for example) let you know the percentage of the N, P, and K (by weight) that’s in the bag. Here’s why it matters: Nitrogen greens up your grass and helps it grow, phosphorus stimulates root growth and helps seeds sprout, and potassium helps your lawn withstand drought and disease. The highest number for lawn fertilizers will usually be the “N”—after all, growing green grass is the ultimate goal, right?

You’ll definitely want to check the weather before you plan to apply fertilizer—if rain or a heavy snowfall is in the forecast, you'll want to wait for another day. A light rain or snow after you apply the fertilizer won't hurt, but a downpour the next day could wash the fertilizer away. Keep in mind, too, that you never want to put fertilizer on frozen ground because the grass won’t absorb it.

We reccomend using Lawn Commander every 4-6 weeks for maximum results a. You can start using immediately at any time during growing season.

You can expect to see results about one week after application. And because Lawn Commander has essential plant nutrients, your grass has everything it needs for better growth, greening, and stress resilience. This helps your grass avoid the feast-or-famine, green-to-brown rollercoaster every couple of weeks that you’d experience with poor quality fertilizers.

Yes, over-fertilization can burn plant leaves or stunt growth. More is rarely better when using fertilizers. Always read and follow label recommendations for fertilizer rates, dilutions, and application guidelines. If you are ever in doubt, always err on the conservative side or use less fertilizer.