and this:

Do I need to add fertilizer in between 'steps'? Or there is anything wrong with my lawn? I believe I water the lawn enough and this is full-sun area.

Thanks,

-J

I am seeing disease activity in those pictures.

-J

Thanks,

-J

Whereas if you watered deeply, the moisture would penetrate into deeper layers. As the surface of the soil dries out, the roots "realize" there is moisture deeper down and will grow deeper into the soil to tap the reservoir of moisture down there. But from where you are now, you will have to wean the grass off the frequent watering. Start by skipping a day of watering and see if the grass wilts. If not, then water the next day but water for twice as long. Then see how much you can skip before watering again for that same time (30 minutes). Every sprinkler system delivers water at different rates. Getting to 1 inch per week is sort of a goal, but it is also just the starting point. See how your grass grows at that rate. You might be able to go to watering every 10 - 14 days with your relatively cool temps. There are a lot of factors that bear on the situation.

I believe you have a disease process going on, so hopefully dropping way back on the frequency of watering will stop that without doing anything else.

-J

With that in mind, I have been very successful using an organic approach to killing fungal disease. This can be done any day of the year with no fear. It will sound crazy but here it is: apply ordinary ground corn meal at a rate of 20 pounds (or more) per 1,000 square feet over the entire lawn. Corn meal works by attracting a predatory fungus called trichoderma (try ko DER mah). The trichoderma are undoubtedly attracted originally to the fungi decomposing the corn meal. Once those fungi are eradicated, then the trichoderma move on to tackle the disease causing fungi. This whole process takes 3 full weeks before you see any improvement. And again, you can apply corn meal any day of the year, rain or shine, day or night. It does not have to be watered in, but it has to be moistened. That will happen with normal dew or you can moisten it yourself.

Not to be a cynic, but I could have made the same free estimate without looking at your lawn (although I might have added tall fescue to my guess, I mean estimate). Scott's probably offered to look at the lawn, but I'd be surprised if they did any real analysis. They know those are the most common grasses in the seed mixes they sell there, so they tell you that's what you probably have and they're probably right.

Also, you need to stop watering every day, and follow the previous advice mentioned earlier in this thread on watering less frequently and applying more at one given time.

I will also add that here in central N.C., I am seeing positive results from using an organic approach to fertility, which I learned from dchall. You should give it a try, as detailed in his previous post above.