I go for about .5 pound of N all 3 times... May, Late August, and early Oct... I'm mostly forest lawn, and high amounts of N causes more problems for the shade grasses... although if we get a lot of rain at any given period I may put down as much as a pound in one app...
Has your early Spring Sumagreen had any benefit compared to similar lawns w/out???
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage,,, I wonder what does...