I live in Northwest Denver and have always had a thriving lawn without doing much work beyond regular feedings. A couple months back I noticed two "issues" with my lawn. 1) the grass in 3 specific shaded areas seems to have a gray mold that can be wiped off the blades of grass, however it continues to be present, and 2) the grass appears "splotchy" in a couple different areas. By splotchy I mean some of the grass is deep dark green and healthy looking while there is much lighter green (almost yellow) grass mixed in with the dark green colors. I have applied the Scotts early spring treatment (fertilizer + crabgrass preventer) and the late spring treatment (fertilizer + plus 2 weed control) so far this year and no other treatments. Any ideas what is happening?
Any suggestions are greatly appreciated.
Denver County Colorado lawns and turf
You may have multiple problems going on. The grey mold could be powdery mildew while the straw colored grasses could be leaf spot and/or Ascochyta leaf blight.
Here are some fact sheets that provide details about all of these turf problems:
If you would like someone to come out in person and provide a complete diagnosis, CSU offers the Lawn Check program for a fee. Information about this program can be found here:
I hope this helps.