I plant a beautiful lawn every fall but sometime in spring it rains a lot and fungus attacks and kills my lawn. I've tried fungicide but it seems every year it rains at some time unexpected and i don't realize till its too late. I don't want to keep putting down fungicide. Is there a more permanent solution? I live in the northeast and have a blend of fescue, ryegrass, and bluegrass. I dethatch and aerate every fall.