I had a new lawn and sprinkler system professionally installed in 1999. Every year since 2002 there have been numerous dead spots everywhere. It looks like it will be the same this year. I have always had a professional landscaper take care of the fertilizer/weed killer/grub control applications. (I usually do apply starter fert. between his applications-this was a tip from the lawn installation company). He has been unable to explain why my grass dies. The water from my point well has a lot of iron in it. The grass is Kentucky Blue grass and was originally hydroseeded. My neighbor next door does not have my lawns problem. His lawn/sprinklers were professionally installed in '99 too, by a different company. His grass was from seed and his water is city water; no iron. I took a few pictures, but if I understand correctly, the rules here will not allow me to post a link to them so I have attached just one. -Is the iron a problem? -Am I stressing the grass with the starter fertilizer? -Good loam was added over my original lawn- I assume that is deep enough. -I mow at 2.75" (1" lower for the last mowing) What do you think is the problem?