I have pretty much just been using Milorganite for 2 years on my 5000 ft sq lawn. This spring I have only put down some Milorganite in early April. It has been cold here for most of April with a few 70 degree days mixed. My lawn compared to the neighbors is not quite as green or appears to have some dormant areas. One neighbor uses a lawn service and the other applied 28% N with mycorrhizas fungus at the same time in liquid form. In the summer all 3 lawns are very similar in color and thickness. I am wondering if the microbes in the soil that react with the Milorganite to release the nutrients are more active as the soil temp comes up. I apply Milorganite at the recommended rate of 36 lbs per 2500 square ft. Next year I will apply a starter fertilizer in april to get lawn off to a better start. By the middle of May my lawn will hopefully catch up.