Organic Lawn Problem Solver Serious problems can arise even in a well-maintained organic lawn. Perhaps the soil is low in nitrogen after a dry summer, causing rust to creep up on the blades....go to the Organic Problem Solver In This Article >  Yellow Grass >  Bare or Ragged Patches >  Red Grass >  Whitish Grass >  Brown Grass >  Shabby, Worn-Out Looking Lawn >  Mushrooms >  MOSS >  DIRT MOUNDS