16-16-16 seems to be a good fertilizer for the grass type that i cut. Its a mix of blue grass and rye grass and some weeds. But it seems to get the grass green fast and keep it green for a longer period of time then a higher nitrogen fertilizer like a 21 7 7. My luck with higher nitrogen fertilizers is that they make the grass grow to fast and rob it of other minerals and the grass doesnt stay as green as long. Just wondering if any one else has played around with these types of fertilizers.