I applied a winterizer application this year to my TTTF for the first time and it seems to work as advertised. I only use organics (grains, Milorganite) otherwise but even so I am being very conscious of the amount of N I put down as part of my effort to deal with brown patch this year. I intend to put down a few grain applications and then only one Milorganite application in late spring. Milorganite really helps the grass and the iron gives it a great color. Most of my N will be applied in the fall.