 It helps the soil retain the water. It does not make your lawn grow. It just makes it nice. It turns a very nice, deep green. The color's uniform. There's not light spots and dark spots. It's just absolutely gorgeous. Remember, Humigreen is not a fertilizer. It's a unique, biologically correct product that enhances the soil and actually improves it every time you apply it. I was mowing twice a week, and I applied Zamzo's Humigreen, and I'm down to once a week now, but I've still got a super green lawn.